Sorry for not responding earlier but only just seen your thread.
We sell polycarbonate headlight guards for the F800GS, F650GS Twin, R1150GS/A and R1200GS/A and got plenty of them in stock for immediate despatch.
www.ruggedroads.co.uk
If you've got any questions about our guards just give us a bell.
I took my Touratech headlight protector off my GS and tried the Rugged Roads version. Much better! Light bleed virtually eliminated and no need to buy the £35 eyebrow that the Touratech version needs. I am very impressed with a number of items that I purchased off RR and will be using them again.