Hi Duke
I'm guessing you've already looked at the BMW ones?
Part no 71607684065 gets you a set of two for a twin spark model.
I think you can get them individually, and there is a different set for single sparks.
I can't remember the exact cost, (<£50 for a pair?) but it was a lot less than Wunderlich. Any main dealer could give you the price.
Darcy has a great photo here:
http://www.r1150r.org/board/viewtopic.p ... highlight=
They're plastic, so won't survive sliding too far down the road. But for low speed clumbsiness they're just right. Could save your blushes, and your wallet.
I'm not sure they'd wear any worse than the Carbon fibre Wunderlichs actually.
Anyway, I work on the basis that if I drop it fast enough to make the difference I'll have a whole lot more to worry about than a new head cover.
And if you're stuck at the road side you don't have to take them off the get at the plugs.
Cheers