I am in need of replacing the seats, thwart, and probably the yoke as well on a Old Town Discovery 164. I sent an email a few minutes ago to Old Town (they are very responsive) but this forum may be a better place to ask. I’m wondering of there are specific sites that cater to canoe parts.
I took your advice and ordered the ebay set. I haven’t installed yet but it sure does look like a high quality ash set. Very impressed and under $200 delivered for 2 web seats, thwart, and yoke is a great price.