Sixman,
Blue Max/Pegasus does limited run plastic kits of the Halberstadt D II in 1/48th and 1/72nd scale. The 1/48th scale model was one of their more recent kits - modeling skills required.
Blue Max was recently bought out by Freightdog Models (sorry no link, but it should not be hard to find) and if I am not mistaken they should still have kits available. I hope this helps.
Mike