found the link:
http://forums.clubrsx.com/showthread...ight=fog+lexan

The instructions includes info on the polycarbonate and sealant. I used a dremel tool instead of the saw & grinder. I made four lenses at the same time, and still have 3/4 of the small sheet left.

The lexan/polycarbonate material is a little flexible, and the lens frame will bend the polycarbonate sheet and hold it against the curved housing. Hopefully the HCH-II foglight design is identical.