Blue bulbs for my '66s gauge cluster...how?

Anyone saw any blue bulbs for the early model gauge cluster? I wanna have mine glow blue to go with the ext/int of the car. I cant find any though...I did it to my '77 1/2 ton but that uses 194 lights so it was easy...would even wrapping them in saran wrap work? Or would that just fall off after time or somethin?
 
walmart has testors trans blue and red in the spray can, and that is a good tip was wanting red dash lights and couldn't figure out how i could get them now I can do it may do it tonight.