Siebenrock buy them from HE.
Looking at the Siebenrock catalogue last night and you can see the HE on the caliper adapter
Is there a need to change the lower brake pipe as the Siebenrock catalogue says? If so, then the Wunderlich option looks interesting as it has a floating disc as well.
Wunderlich for the para: http://www.bmwbikebits.co.uk/products/product-2630-Wunderlich-GS_Brake_Tuning.htm
Doesn't seem to have the mono option, only this comes up for the G/S: http://www.bmwbikebits.co.uk/shop/item.asp?itemid=2526&catid=



..good learning curve for me 


I also ordered an OE screen as well...so when they are both in then they will send them. G/S covered in welding dust at Verns at the moment......he is well on the way to making his panniers fit an airhead
