Quoted from Crash:
Possibly. Jody with Ramp-O-Matic is making a ton of new ramps this year. One person asked about Frankenstein, but didn't get a response. The legalities involved with Stern may get in the way. He hasn't mentioned anything about DE/Sega/Stern games, with all assets owned by Stern. Technically he can probably get away with clean room re-engineering ramps for this era as long as he uses his own molds and does not include copyrighted decals.
I'd definitely ask about it, may get his attention!
I have a ramp that I picked up from John Borg 10+ years ago. Mine was broken and as you all know these are impossible to find. He told me this ramp was used in the game development, probably an early prototype. You will notice there are machine cuts in the plastic, not ones that were molded. I'd be willing to sell it, I'm not sure what it's worth but probably a few hundred.