Shopping from Canada? 
Go to Defender Canada!
Attwood Zig-Zag Fender Hanger - 11952-7
$10.46
Attwood Zig-Zag Fender Hanger - 11952-7 Item # 1379627
Description
No need for knots in your fender lines. Keeps fenders in place with a simple system. Put line over rail and weave it through the zig-zag teeth.