Check this link to a webpage out. There is a front view of the R.VIII further down the page.
German Giants
http://www.earlyaviator.com/archive/...mens_Rviii.jpg
Also, why not check with the Siemens-Archiv in Germany? They have photos available for research. I received a few nice photos of this aircraft when I contacted them a couple of years back. I don't have them with me on this machine, but you can email them at:
siemensarchiv@siemens.com