Big Mike:
I bought mine from Accessibility Systems (?). I did a search on the web, but I can't find them. I'll go home and look for my invoice with their address/web page/phone/etc...
The rotisserie went together real easily. I bought their 3000 lb unit with dual hydraulic jacks. It moves around my driveway pretty easily with the shell on it.
After assembling the thing a year ago, I was really able to get a lot of pain-in-the-ass work done on my '71 'cuda convertible. I wish bought the rotisserie when I bought the car. It's the only way to go, makes working on a car much easier. Getting the car on the rotisserie was no picnic, though.
It cost me about $1,850 and was worth it.