Just make one out of green plastic! Another option is to get some green LEDs instead, run cooler, and last longer.
oh right, wouldnt have expected a place like halfords to sell them, ill try anf get tomy local soon and look. Cheers
Damo - take a look through this. You can go for loadsa different colours.... http://www.ultraleds.co.uk look for car 12v LED bulb replacements...