Quoted from dzorbas:
You know you can get a repro backglass from Mayfair Amusements in New York right? Apparently they were made by Williams in the 80s or 90s. I picked one up a while back. The colours aren't 100% the same as the original but it looks really nice particularly when you put coloured LEDs in the right spots in the back box. Not cheap for someone in Canada but my game has a CPR playfield and plastics so it only made sense to get a nice backglass for it!
Check this post for a picture:
Yes and I have mayfairs in both my Gorgar and black knight and they are perfect. I saw the colors are off on firepower a little and actually I kind of like the yellower look. I am into the middle of the machine (the back box is still in the floor) and I have plenty to do before I start ocd'ing on the glass. Give it a few months. Any idea on current price on the mayfairs?