I make my own, if you can do very simple maths, understand a basic wiring circuit, and read a multimeter you can make your own.

Made all my own for my Shogun, found and measured supply voltage, made voltage regulation circuit by using a TO 220 voltage regulator which is a 3 pin regulator (35p each)LED's are £1.47 for 50 red 170,000 MCD (brightness) and £1.24 for 50 90,000 MCD red, and resistors are about £1.00 per 100.