I have 1 new never been painted flatbed body that is 12' it does not have a bulk head but I can modify it to meet your needs maybe fold down sides or ? (Deal fell thru)These can be used for contractors or ??? because they are not painted I can modify the bed if needed or I can make up a new one to your spec. We also make up custom trailers to meet your needs. We mount dump bodies and construction bodies as well. Send us your name and number and we will call you to discuss your needs.