Quoted from Zitt:

Patofnaud,
Can you provide details on the blue tubing used?
What ID and OD?
I'm looking at tubing via google and this came up:
https://www.grainger.com/category/polyurethane-tubing/tubing/pipe-tubing-and-fittings/plumbing/ecatalog/N-qxaZ1yzahfo
I'm going to need to build completely new Chase Light assembly as my game did not come with one. (I assume an OP removed it when it stopped working).

Quoted from Swainer80:

After retrofitting my origionals (some of the lights were burned out) I made a pair from scratch for a fellow pinsider who was lacking them about a year ago. It was tedious but I found some blue vinyl tubing online, 12V cool white 5mm leds, soldered them together with a common positive and soldered every third light to make the 3 chaser circuits (with the leds, the i had to make sure the polarity was correct). The only problem was the leds washed out the blue tubing, it looked fine with the lights off, but very pale and too bright when lit. The fix was dipping each bulb in the felt wick of a blue sharpie. The only thing i would have done differently would to be to try using 3mm leds with being able to try to slide the whole assembly in the tubing vs having to slice the tubing long way and slowly push the mess of wires and lights into the tubing. I does look quite nice on my star trek. Ill try to post a video later. Good luck!