Bit of a long shot here, but I dropped my fazer in a muddy field on the dragon rally (huge embarrassment there but another story!!) bike came off ok, but the pannier not so much.
Limped home with a bit of duck tape plugging the 3" hole, but before fibre glassing it and making do, I wondered if anyone had an old style e34/36 pannier knocking around that may be surplus or even damaged that I could poach for spares.