FWIW, my last email to specialty plastics was sent well over a year ago and received no response. To be fair, I had been told that they were not operating anymore a year or so before that (but I had to try).
My best advice is to keep an eye on eBay, particularly for mislabelled items ... I got my beautiful, crack-free, Tron stick because it was mounted on a bizarre machine on a big two-way handle stick (can't remember the name or the game right now) and didn't come up in a normal search for 'Tron'.
Good luck!
If you do get through to SP, I'll take two blue and two red handles !!