I made my own front mudguard extension from the rear part of a R1150 front mudguard. Parts are:-
1 R1150RT or R rear part of front mudguard.
8 x M5 screws and nuts.
16 plain washers.
2 pieces steel flat from your scrap bin. Mine are 12 x 2.5 x 195 mm.
2 x 20 mm stainless P clips.
There is a rectangular raised section in the centre of the 1150 item that needs to be cut off flush.
At the two middle screws between the mudguards I put 4 plain washers on each screw between the items to keep the 1150 item angled down and away from the exhaust.
The P clips are a little wide to fit the gap between the calliper and the fork. Take the rubber off and file the clip down a few mm before refitting the rubber and the clip.
It works a treat.