The zipper on my bag stopped working about a year ago. I had been trying to use it anyway but things kept falling out. I recently learned that hand stitching isn't that hard, so I went out and got a new zipper. Here's the old zipper for reference
https://github.com/webhdx/ETH2GC It's a little thing that does the same job as the official broadband but with a lot less bulk. And it's not prohibitively expensive.