Is there anybody around here who does inudstrial-level zipper repair? It's fairly esoteric, I know, but the short version is that the zipper on my tuba's gig bag is broken and I'm looking to get it replaced. Normally I'd take this to a tailor/clothier but tuba gig bags are much too cumbersome to get under a standard sewing machine, so I'm wondering if there's anybody around here that can fix it for me. It doesn't even have to be in the Twin Cities proper, I'm willing to drive a fair distance for this thing. TIA