Google is your friend 8)
Do a Google search for "Simtech Triplane" and you'll find the SimTECH Fokker Dr.1 (used to be payware, it's excellent). You can choose a 5MB file with a single paint job, or the huge 72MB file with 20+ paint jobs. Comes with all the bells and whistles including VC and is great fun to fly.

For a Sopwith Triplane, go back to Google and search for "triple.zip", it's by Frank Elton (Pegasus Aviation) and is under 5MB in size.
Gryshnak