Just you wait Henry Higgins just you wait...

JeenniferMarie, to check out the parts on the website for Wenonah, just go over to the column on the left hand side and click on the accessories link. I did not see the seats on there though. You can call them on the phone here: 1-866-wenonah. As Charlie said above, you can then ask for someone who deals with parts. Tell them Mastodontico sent ya...ah uhm...on second thought, better not.
Jimmmmaaaaa, Charlie gives good advice. For speed, do not wax a composite boat. Sometimes I wax them, but it is just to bring the shine back. I use NuPolish.
As far as aluminum boats go, to be honest, I do not know if waxing will help the performance. I do know that shiny boats give you mucho machismo! Chica's dig it. We polished the crap out of ours before nationals, but that is only because we were trying to look fabolouso! Can you guess which canoe is ours?