How about bashing a sport plane kit to resemble a warbird? You can do a lot with a Sig 4-Star. I've also thought that the GP Super Sportsters would be a good platform to make a sport plane that resembles a WW-2 fighter, especially some of the Russian stuff.

Another idea is a Cub. Golderberg makes a nice cub kit. These were used by the military in WW-2 and given a different designation of L-4. Cover it in olive drab with invasions stripes and markings, add some scale detail, etc. Not only will you have a genuine warbird, it'll be a plane you'll likely be ready for after you master your trainer.

Get a few simpler kits under your belt then go for that Corsair.