There are a lot of biplane racer, I have found this link that can be helpful
Hot Kanary biplane 
besides I have some 3 views
and this picture where can be seen that Cobra is a slightly modified Sundancer.
and last why not thinking about the most unusual of them all designed, you guessed, by Burt Rutan ?
These are 3D images created by a Czech friend for his AeroFlyProfessional De Luxe flying simulator model, based on a model of mine.