I've not run into any, although most of the 'Joe' and a lot of the 'Cobra' vehicles are actually directly based on RL vehicles, although some of them are more obscure examples. I imagine it would be pretty easy the kitbash some into shape, although the scale could be an issue. If you wanted 3.5" scale (1:20 or so) many stock model textures will translate poorly. Anything in particular you were looking for?