Dash Bulb Help Needed

I have 2001 Prizm and one of the bulbs in the dash blew out. Its th bulb that lights up the temp gague. I want to buy the bulb for this then take out the dash and then replace it, nobody has any idea what size bulb it is. Any body know? My Chevy dealer lists five diffent bulbs and he has no idea which on it is, according to him I can buy all five at $10.00 each and then find out (yeah right!).

Thanks,

Lance

i believe the cluster bulbs are 194 and you can get them in a double pack at walmart for about 3 bucks