I suggest you talk to Pete & Jakes ... in Peculiar MO. http://www.peteandjakes.com/history.htm
Peculiar should not be all that far from you. They have been in the business for a long time. At one time ... they sold a body/chassis package. They still may ... Or they could suggest a good body supplier.
Another avenue is to look around and buy a unfinished project. 33 - 34 Fords are a popular model and sometimes great deals can be found. Folks buy a start ... and then things change. Finances changes, DIVORCE happens and sometimes ... the would be rodder finds out that this rod building is not as easy as take part A, insert part B , glue part C and then ride like the sales brochure or the magazine said.