Quoted from vid1900:Back in the day there were black, paper thin, reproduction corkscrew ramps.
A few years back there were some thicker orange ones from Jim, but I have not seen them in a long time.
Vid, I believe some of the original corkscrew ramps also came in orange. I have a populated playfield from a Comet that was parted that had the orange corkscrew ramp installed albeit, broken in several spots. That ramp was paper thin to say the least...