When I had my old PVC tubes on the ribeye, I used Traffic film remover watered down in a spray bottle. At the time I though it was a miracle cleaner but have now changed my opinion of it.
It made everything it touched brittle and rough. The pvc seat upholstery all fell apart and seemed to deteriorate from then on, the top layer/colour disintegrated. The tubes just seemed to get worse, loosing all suppleness and made it difficult to stick patches/repairs. I know this doesn't answer your question about ribshop cleaner, but just go easy on the chemicals.
I have found this to be useful, Autoglym Bumper and Trim Gel 325ml from Halfords. Which is probably the same as above!