was looking for something similar long time ago, rub strip but not for kayaks, resolved with a rubber edging for forniture.
Short than calling a manufacturer close to you and ask where they get them from maybe automotive and forniture rubber trims can be adapted.
to give you a few links
http://www.trimlok.com

http://www.industrial-extrusions.com/plastic.html

maybe you can stumble upon the perfect gasked for hatches while hunting around.
If they have just a decorative/minor protection did you think about visiting an upholstery store, get an heavy "ribbon" and set it in place? maybe even rubberize it with some Plastidip?
http://www.plastidip.com/consumer/index.html