Dasuto,
Easier than you might think. Take one of Tangos B25C gunships & use that model (& elements of the dp file) for your PBJ-1C gunship. Apart from some small mapping differences that a dedicated paint can correct, it certainly looks the part...
I knocked this one up really quick, it uses the AF-Chatterbox B25C-1 strafer model with the default PBJ-1C.