I have an old down sleeping bag with a zipper that’s lost some teeth and needs to be replaced. The rest of the bag is in great condition, especially considering its age (about 35 years). The prices I’m seeing to replace the zipper run from $100-200 in my area and with REI’s repair service. I’m on the fence if it’s worth it vs just getting a new, modern bag. Any advice from those who had a zipper replaced?

Also, if I do decide to retire this bag, what are the recycling options? I’d hate to let good down go to waste.

Thanks!