i knew the light for the clock was gonna be expensive..i had one for the door panel lock(it was i think the same size but green), cost me $6.00 well i went to a local auto parts place and got one for 50 cents and it worked fine...
if i ever need the colored bulbs i would just go to radio shack and buy some paint for bulbs.. comes in small bottles if they still sell it, if not then another electronics store might stock it......