StreamChucker:
I purchased a lot of bulbs and reflectors from Carley that became a partial group buy with a small number of bulbs for Ake and Klaus.
Carley currently has no minimum order requirement on direct purchases. They do have a 5-bulb minimum requirement for potting.
I think it would be a good risk to buy the # 808 T-2 1/2 bipin bulb along with a #912 bipin to PR base adapter. This adapter is not ceramically potted (it is plastic filled) and is only rated to 1.0 Amp. Patty Taylor at Carley advises, however, that many customers report that they have run 1.1 A and 1.2 A Carley bulbs in this # 912 adapter without problem. This adapter has a $3.35 single unit price.
The problem, were it to occur, is that the plastic would soften and deform from the heat running through the pins, not the heat of the filament in the glass envelope.
I potted other bulbs that were in the 1.6 A and 1.7 A range so I had the #808 potted.
A less aggressive and commercially available 9.6 V option would be to buy some Makita 9.6 V PR base bulbs. I think they are either Krypton or Xenon and are about 0.60 A. You could probably get these at a tool store or at Home Depot.