Would someone be able to suggest a specific optic?

Also, what is the method of attachment for heatsinking?


[edit]
Just came across this: http://www.dealextreme.com/details.dx/sku.14413

looks great to me, ready-to-go.
Make a case with some heatsinking, and tag on a battery pack. Attaching the leads might be a little messy, but there has to be correct solder tabs inside somewhere.

[another edit]
Although that's rather power hungry..

This seems to be the xr-e equivelent http://www.dealextreme.com/details.dx/sku.14442