If you want info on the Airdrome Airplanes designes, go HERE:
Robert Baslee is the designer. I met him at Oshkosh 1998, heck of a nice guy, very helpful and informative. His kits get good reviews, and look pretty doggone good. They are all 75% scale, and generally use 2-stroke Rotax power. (Ok, they aren't ALL 75%, he now offers a full-scale Nieuport kit...)
In the case of the D-VII, it looks pretty good to my untrained eye, EXCEPT: it is wire braced, not cantilever... (not something you can see from a distance!) and the wing thickness of the upper wing doesn't appear to taper like the real thing. Other than that, it looks pretty authentic.
He also has kits for the Dr I, the D VIII, and the E III. The E III and the D VIII are the only 2 that meet the weight requirements to be considered an "Ultralight" under US regs. Ultralights are not registered, and you don't have to be licensed to fly them. They DO have operating restrictions of course.
The E III has 2 "appearance" issues, those being the way he did the suspension on the LG legs, and the fact that he used a single set of flying and landing wires instead of 2 like the original. Otherwise, looks very good. The D VIII has extra wing struts, so it too looks less than 100% authentic, but still very good. Per Dick Starks of the KC Dawn Patrol, that is the best flying one of Baslee's designs. (Read- easiest for an inexperienced pilot to fly.) The Dr I looks pretty authentic, except for the wings being wire braced. I also think the "cheated" on the nose length a bit to make the Dr I and the D VIII balance. That, of course, would not be needed on the E III or the D VII, due to pilot location on the E III and due to the longer nose on the inline engined D VII.
To sum up: If you want a D VII kit "on the cheap," and don't mind that it has wires where it shouldn't, this is a good choice. $4995 for the whole kit, just add engine & prop, instruments, paint, and (ahem!) a "bit" of your time. The D VIII and E III are only $4495 each, and the Triplane is a bit more... $7495. Keep in mind that these are essentially materials kits- you pretty much fabricate everything, although I believe the fittings are pre-welded/machined as needed.
Another alternative is the 87% scale Nieuports 11 from Circa Reproductions. (Graham Lee) This is a very popular design, and is plans built, with essentially the same construction method as the Baslee designs. (basically, Baslee "borrowed" the construction methods from Graham Lee.) You can also build a "German Nieuport," a.k.a a Siemens-Schukert D I, although this aircraft wasn't exactly common.
You could also strike out on your own like I am. Yes, it has more risk, and certainly more frustration... but I will have a very unique aircraft, and I can say I did it all- well... honestly, I too will "borrow" techniques and structures from others... in my case from the "chuckbird" series of ultralights/light aircraft. I'm in the planning stages for a Roland CII. It is to have a Geo Metro (suzuki made) 3-cylinder water cooled engine of about 70 HP. Engine weight is around 100 lbs. without accesories, probably near 150 all-up. I already have the engine- I got it "free" in exchange for some labor.
Just yanked it out of the car last night as a matter of fact- I "traded" some work for a running geo metro with a bad transmission. I'll certainly change the timing belt at the very least, probably do a valve job, and maybe a complete rebuild. It runs strong, but I don't know how many more hours it would be good for.
I'm figuring my airframe costs will be around $3000 for materials, perhaps a BIT more... probably $500-750 for a reduction drive (to spin the prop slower) and between $400 and $800 for the prop, depending on what type I decide to go with.
I originally wanted to build an Albatross D series, but my buddy talked me into a 2-seater... so, I poked around and decided the C II would be best. It's relatively small... it looks good... the wing attach points will be MUCH simpler than on a biplane with cabane-mounted wings... it has an inline engine so the nose is longer, making it easier to balance with a heavy pilot... it would of course have to be flown solo from the REAR (observer/gunner) seat, but that's just the way it has to be! It has relatively generous tail surfaces with fixed surfaces instead of the full-flying surfaces on many WWI aircraft, so it should be more stable and docile. The fuselage will be harder to construct than some others, due to the molded shell that they used, but it should be fairly straightforward, especially if I just use a lightweight fairing around a truss structure.