I've sent a message to Aire and have every confidence they'll reply soon. The customer service from Aire has been nothing shy of phenomenal.
This looks like it was a very, very long zipper that had been cut and used.
Worst case, I'll just put in some stitches in the fabric around the zipper and not use the zip part at all. Not such a bad worst case.
- Big D
Paddler's Truck Rack
Kayak Motor Kit