Hey,
I'm not sure what kind of hobby shops you've got in your area...but most respectable ones have a selection of auto decals. They sell a lot of dragster stuff, and nascar. They also seem to have a lot of gasser decals. The pages are about 6x8 inches and I think run around 5-8 bucks a piece.
I've also built a 4x4, and I got a hold of some inkjet decal paper to make decals for it (K&N, Edelbrock, Flowmaster) I just visited the websites of the "logos" I wanted...then just printed them to scale onto decals.
Also, if you do a little bit of research, you might be able to find some sort of model meet near you. Boy, if you can make it to that, there is more junk there than you will know what to do with.
good luck!
-jonathan