I wonder if anyone can offer any pointers on this one. I have a Vincent Bach bass trombone gig bag which I bought just over a year ago. Due to my stuffing it with music/thick books to read on the bus/umbrellas/jumpers/etc..., the outer material has split along much of the length of the side of the long zippy bit. I've just taken it around all of the leatherworkers, dry cleaners and sewing shops in the centre of Oxford, getting a "we don't do that sort of thing" response at each one. I'm stumped as to who might repair this - anyone have any better ideas?