G'day Mike. Mine's the flat ended one that bolts to the lower fork leg and to the mudguard with a single, open-ended bracket - it was this bracket that sheared off. I reckon I could get it brazed/welded, but my 'mod' should work better, especially with the rubber insert.
I also sheared one of the 'Y' shaped brackets on the upper lower leg!! Snapped right in half. Again, not sure about brazing/welding but have ordered one from Draganfly for about 13.00 GBP (decent price for a new one).