hot rod accent bulbs

[19mustang65]

does anybody know where to get the light bulbs that come in different colors. i see them on alot of hot rods and stuff. its just a colored bulb you can put behind grille or inside headlamp or whatever.
the only thing i can find are the stupid neon bars and stuff. i just want bulbs i can wire to a switch.

 

[2nd Mustang]

Why? There are only certain colors that are legal on the front and back.

 

[19mustang65]

its for show not for driving around with.
i already have them in my headlights, but now i want to put them in my parking lights. i just cant seem to find them now