-- Last Updated: Oct-23-12 6:53 PM EST --
I was just there last week getting a gasket and they were setting up a workshop area for seam taping. Not sure when it'll be ready but it's worth a shot:
http://www.kayakacademy.com/
Also try
http://rainypass.com/
If you seamgrip/aquaseal your own, get a monojector syringe with the curved plastic tip and let the sealant sit in a cup of warm water for a while to thin it out. Alcohol wipe the seams first.