I've looked through all of our local commercial auto parts stores in town. Just one had the Mar-Hyde brand.

As far as using it, I would save it for cleaning only if you take it all apart. It's really not hard to do that but usually its safer without any bearings to get hurt or solvent being trapped somewhere. It's a jelly consistency just like paint stripper. Your trying to remove varnish so I tried it and it worked fairly well but you still need to be able to scrub where the carbon is hiding for it to go through it.