short answer, unlikely. People could but those that could would be unlikely to do so as you would be chasing them if a fix or update was required and I doubt you would want to pay a proper hourly rate for their time (I'm making assumptions here) so it would be more of a pain than it's worth for them.

In fact, a quick search on google throws up the open source melty brain spinner as the first result

http://lmgtfy.com/?q=melty+brain+spinner&l=1

Read this as it's what I was using as my basis when I went through the design work. I did have a disc / chassis made from hardox if you were looking for a solid base for such a machine.

Edit - re-read the post further up. repeat link but smeh.