Where can I find bulb for my projector

I have a Vidikron projector and may need a bulb in the near future. Does anyone know a place ot find bulbs that are inexpensive?
Projectorpeople dot com however a new light bulb will set you back $ 200 to $ 500, sometimes the advancements in projectors is so great that you'd be better of spending the extra $ and get a brand new up to date projector.

Best of luck