I considered making one using two electric motors as the rollers/bearings/shafts. The type of motor without any wire on the shaft part. (induction motors)
Some bike sprockets & chain & another electric motor that I could control the speed of.



But then I got sick of cutting the brass clips off the wire. I was doing this so I could burn the plastic off originaly.

Then I looked for a way to strip the plastic off cleanly without all of the pollution & making the rollers seemed a way to do it.

Then one day I just sacked up the plastic coated wire, with clips, and sold it 'as is' to the scrapper & got a reasonable price. After that I decided to just use the time I'd spend cleaning & clipping, to get more wire. And sell that.

Maybe the electric motor-shaft idea may help you though.