There are offered some kits by Revell,Eduard Roden both in 1/72 and 1/48 scales ( Revell no.4116, Roden no.14782, Eduard no.7016 and 8161, .In 1/32 scale Dr1 is offered by Roden no.601, in 1/28 scale by Revell no.04744.
Use Google for finding please.