VistagraphX bulbs

[filmteknik]

Older Electrohome (taken over by Christie) DLP projectors are now available at a good price but what is the availability of the bulb modules and how much are they? In particular I'm looking at the VistagraphX 2500.

I understand the actual xenon bulb and reflector unit is made by Perkin-Elmer. Is it possible to get these and install them into the Electrohome heatsink module?