Aluminum J channel seat mount material?

Anyone know where I can find the J channel that is used on the seat mounts on some jon boats and flats boats for the cushions? The jon boat I just picked up has this for the seats and along the rails and I’d like to find a stick of it to be able to make some brackets for movable rod holders and such. I would need just the part that goes on the seat.

Anyone know where I could find this? I’d like to get 6’ or so. Thanks

Black River Marine in Orangeburg has some. Call them at (803) 536-2277, ask for Andy.

'06 Mckee Craft
184 Marathon
DF140 Suzuki