YKK or Yoshida Kogyo Kabushibibaisha.
Top Flite is the worlds largest golf club manufacturer.
Gm and Honda
mossberg
Anheuser Busch-InBev
Ford
FORD
Colon, MI
Other than Legos, the worlds largest tire manufacture is Goodyear.
Ritek Corporation
Huawai
The best advice I can give you is write a letter to a zipper manufacturer such as YKK, JNZipper, or Supreme Zipper Industry
you can replace the zipper. take it to any tarpaulin manufacturer,or to an automotive upholsterer