At last, a broken zipper fixer: What a brilliant idea:
FixnZip® isn’t your average zipper repair kit. It’s a replacement zipper slider that you can install without tools or sewing.
- FixnZip® replaces damaged or missing zipper sliders.
- Repairs broken zippers that separate or come undone.
- Fits a range of zipper sizes.
- Works on nylon coils as well as plastic and metal teeth.
- Can be used on both opened and closed end zippers.
https://www.fixnzip.com/ & http://www.equipped.org/blog/?p=86
It looks as if an even simpler device (Fix a Zipper) is now available (Jan 2018) on eBay, available in six packs (out of China) for around a dollar!