The early microscale/superscale F-15A sheet included the Bitburg tailcodes and squadron badges, but you might be better off just getting some generic black letters and numbers of the correct type. I dont know where you can find the eagle markings worn on the inner face of the vertical stabilizers that photos show on some 36th TFW.
Repliscale sheet 5061 has what you need, but is long OOP.
http://www.modelingmadness.com/scotts/decals/rs/rs485061.htm
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM