There's a company out there called Auto Twirler
They come to all of the big car shows and do offer a show discount. We picked up this body dolly at Carlisle
last year. It's not inexpensive, but if you're in the business it is absolutely invaluable. It is called the Substitute Frame Cart
and is superb.
The shop has a couple that they have built in the past, but this one beats them all hands down. The car can be pushed around by one person and everyone is very happy with it. Auto Twirler also offers a device called the Auto Twirler Plus
that you can mount this Frame Cart
in and then twirl the body and cart together.
After seeing it at Carlisle
we first thought about just taking some pictures and building one. That evening we ran some numbers and realized we probably couldn't build it any cheaper and are also looking at buying another one.
Good luck... GUSTO