When I first saw Robnobrakes setup, I knew I wanted to do the same.
To keep the option of going back to stock, I got a s/h Bonnie rear 'guard from Jack Lilley, marked it up with masking tape and took a grinder to it. finished off with a hand file and some emery cloth.
Here it is back from powder coating;
And mounted on the bike;
I made up a simple bracket from aluminium plate to mate the 'guard to the bracket that comes with the LED tail light. I got a curve in it to fit the underside of the 'guard by making a series of bends and then lightly hammering over my workshop fire extinguisher;
The finished result;
