rjones,
My service manual is for my 1995 truck. It doesn't list the wait-to-start lamp, but it has about all the rest of them. The only two types used are the PC74 and the PC194.
If the PC74 is too big, then the one you want is probably a PC194.
For 1995, the heater control illumination lamp is a 158. That is probably the same for your truck.
No guaranties though; this is out of a 1995 manual and doesn't specifically list the wait-to-start lamp.
Good luck.
Loren