There was a Chaparral Body advertised on eBay - surprisingly cheap. It was a 2d - my favorite. {worthless side note: I watched both the 2D and 2E race at the Nurburgring in high school and that was the end of puberty! WHen I dig out the pics I'll post some I shot. }
Meanwhile in the early 2000s, I was still "commuting" to NZ for our sailing life, and messing around with the 'vette when stateside. I called Race Car Replicas to get a lead or details on the Chaparral. They told me it was a "young fellow" in the Chicago/Detroit/can't recall area, who built it from scratch. He got hung up on building a chassis - hey whats's that problem? - and wanted to get rid of it. Sorry - don't think I even took a screen shot of the advert - I'll look though.
In 2020 one came up - hand made - in the UK:
https://fiberclassics.org/chaparral-2d-replica-for-sale/
Meanwhile there are Official Replica (Continuation) cars available - but $200K plus as I recall. Those are being built in Texas (as I recall) and original spec chassis - monocoque aluminum, from original bluelines, etc. Link to a 2E series:
https://www.drivingyourdream.com/store/p798/Chaparral2E.html
But that hand-made body with a tube frame, rear engined BB - or LS would be to Kill for.
Also a few years back, a reasonably priced Cheetah body came up as the "Old Guys" up in Alabama were selling off their stuff. Cramming for finals - end of life I expect. Again - tube chassis all the good stuff a killer racecar for under $50K I'd say.
With today's tech, someone could easily scale up a CAD drawing and mill a foam buck, hand lay the body and buy a sweet chassis. I bet under $50K - but need to kept it simple - no fancy interior - I mean race car not show. Streatable - but not necessarily "spouse comfortable." I'm beginning to think - building from scratch has less time from start to track, than modifying. But again, there is some real satisfaction in making the mods -- as a few members here note!
Hope that is "some help."
Cheers - Jim