I have just found a cheap source for LEDs. I can get 3 or 5mm LEDs in blue or white for $2 a pop. Red, green or UV only in 5mm also $2 each. All of them are super bright. They're just raw LEDs, but it's better prices than you'll find just about anywhere. I've just gotten a bunch myself and I'm gonna populate them around the car. I might end up swaping out some of the dash LEDs as well, but it's a lot of work that I don't know if I want to bother with.