https://biabbags.webs.com/
Hopefully that link works. I have several of these, I love them. Less $ than the other big site, and while more than Amazon bags they are also better. For me it hits the sweet spot for price / quality. (I've got no affiliation with Wilser just really happy w/ the product).
Are you using the rope ratchet they offer as well? Do you have to hold the release to let the rope back out? Or is it more like a switch? Seems it might be a pain getting the bag back down if you have to hold the release with one hand the whole time.