Chris (Glastron_GT160) or somebody over on CGOA found some of the plastic hinge a few months ago, but you had to buy a 100' roll! (I still need some too.) If we got enough people who needed the hinge, we could get a roll and split it up maybe??? I considered using stainless steel piano hinge to replace it, but during summer months it's sure handy to have the windshield door OUT!
UPDATE - Found the old post on CGOA:
Postby Glastron_GT160 ? Tue Mar 09, 2010 7:19 am
Its available, but many places I have found it sells it in HUGE rolls. $285/100ft
Find 50 friends with the same issue and you're all set
http://store.hamiltonmarine.com/browse.cfm/hinge-continuous-plastic-white-1-1-2-100-roll-105567-/4,18291.html
Its white, but shown in black.
Image
You might try contacting these folks as well. They'll need to know the width, thickness, and length you need. "Northeast Hinge Distributors, Inc."
Search for "continuous hinge"
Good Luck.