I know this is a older post but I thought I'd chime in. I looked at Dynacorn(my buddy has one on order) they were 9k with no top, but had doors, dash, tailgate and stock firewall. Premier Street Rod was my 1st choice they started at 15k and gave you options of tailgate, dash, firewall and the top was another 9k. Tuckers Automotive sold me my tub with top, upgraded tailgate, upgraded door latches, AC dash, AC firewall and moved the gas fill to behind the taillight for $25,580.00.
When I talked to Dynacorn they claim their bodies are made of US metal shipped overseas for stamping then shipped back. Both Premier and Tuckers made it sound like their tubs were stamped in the US and assembled in Texas. If the body I have didn't need 30K in body and paint I would have just used that.
Hope this info can help someone.