I have no idea what make mine is as I was given it by the nice guy I bought the SW-Motech rack and side frames from. That and a couple of spare levers (another 'doh' thing that can leave you at the side of the road), so carry them at all times.
I have had headlamp protectors on all my bikes since they were first available. Mine fix with plastic 'velcro' thingies which have some give in them. Whichever make you buy, make sure it is polycarbonate. Mine has a few dings which might have cracked the headlight lens so I am counting myself lucky.
Brian (who knows they are cheap in local car parks but hasn't lost one yet)