I replaced my lens, reflector, and bulb with an off the shelf round Sylvania Halogen automotove single unit replacement at WalMart about 15 years ago. It has served me very well so far. There were three little glass alignment tabs that had to be dremel sanded off the edge and then if fit perfectly within the shell and the trim ring. The R65s' harness even plugged in and hi/lo worked without modification. I was pretty amazed. May not have the firepower that some of you are describing, but since this size appears to be a common enough standard, with the proper three pins for our harness, I'm sure there are high performance ones to be had out there.