Looking to the webisodes they put out, could this be the repurposed TPM? I can almost see the threaded rod/washer detail on the emitter, but I can't tell if it's just wishful thinking:
When I saw the movie, I definitely saw the Zippo logo on the bottom. I remember even thinking that (in the split second it was on screen) it might even have been clear enough to read the year of manufacture
May I present the Spectra-Physics 106-1 20mW Helium Neon Laser:
I believe I've found the laser. It took a while of searching through "vintage laser" on eBay until I found a Spectra-Physics one, and saved the search. A broken one popped up last summer, but sold before I could make a decision...