ok, heres the results of my radio shack trek:
272-1092: These are the super-tiny bulbs that light up whenever recirc, fresh, ac, rear-defog is selected.
272-1154 - These are slightly bigger than the 1092s, are for the backlighting of the switches mentioned above. (This is what I was needing, my orig post wasnt clear.)
Theres a 3rd series of bulbs in the ac control unit, they backlight the ac control panel dials. They are even bigger than the 1154s. Dont know what p/n these cross to.
maybe this will help someone.
john
I just used the 1092's foe everything. They were a little easier to work with. The 1154 wires are bigger, and you have to get a cleaner hole to fish the wires in to solder. I just wanted to keep the heat down on the board. The illumination is the same.