One more Solar Force Question: Colored Drop-ins

In picking out a light for my bro-in-law, I would like to get him a red and a green drop-in for the L2P. Seeing that it seems most people prefer drop-ins from other manufacturers, and knowing that I’m not quite to the point where I can begin to make my own, does anyone know of good, bright colored drop-ins (specifically a red and a green) for the Solar Force? Or should I just go ahead with those sold by Solar Force?

Once again, many thanks for your help!

I have the red Solarforce and it’s OK. Throws better with a smooth reflector. Dealextreme also have coloured dropins and Customlites does xp-e2’s for $30.