Dump bed builders?

Davis builds good truck bodies. I purchased one from them several years ago. Give them the dimensions and they'll have built when you get there, one day install and you're done...after you write the check.

There used to be a place in West Plains, MO called Crown beds if I remember correctly. I don't know if theyre still there or not, but I have buddies that started using them instead of Davis. I think they were a little cheaper. Worth a try.