I just bought this cap on FB Marketplace. It has these rails which my be Thule? I don't have any other parts. I'd like to do a canoe rack. Does anyone know what this style of rack/rail is called and/or the best place to find uprights and crossbars that would work with it??
I got curious and poked around a little. Took a closer look at your shell, and it's a Leer. Leer offers Thule as a factory option, so that's my new guess. Whenever I need rack parts or accessories, I usually order them from ORS Racks Direct. They often have sales and online coupons and free shipping, and I think they have a lot of stuff for canoes and kayaks.
When I needed some obsolete Yakima components, ORS sent me to ReRack.com and they had what I needed. ReRack sells new and NOS and (probably) used rack stuff. They have lots of inventory for a bunch of brands and are very helpful. They would know if perhaps the Yak and Thule tracks can take the same accessories, or could ID what you have.