Lots of incandescent fans still here, although it gets a bit more difficult every year. I'm kicking myself for not buying more bi-pin sockets, baattery holders and bulbs though... I'm down to a 2C ROP low, a 2D WA1111, a Surefire with HO lamp, and a 3D Mag85 that needs a bulb *and* a battery pack since my last 9 cell NiMH stick is now refusing to charge.
EDIT - forgot the Magcharger with some kind of upgraded bulb (1160 if memory serves). OK, maybe things aren't so bad
There seem to be a lot of cheap 6V 20W bi-pin bulbs on Amazon - I have a pack on the way to see how they behave with a bit of prodding. Just remembered that those bulbs are Osram 64250's which you have already covered. Excellent !
I'm starting to see interest going back towards incandescent, in the same way that people are going from low-res digital back to vinyl. I have had a few people now refer to my incandescent lights as "real flashlights"... people seem to be getting tired of cool white.
Thanks very much for all the great information you have brought to the forum (and to the great unwashed like me).