Lund Pro Track Plastic inserts

[NVFisherman]

I am looking for a place I can order via phone or internet to get some of those little plastic inserts you use on a Lund Pro track. This is the track that is on the outside of the boat. You screw your downrigger brackets to (See Picture). I am also looking for the snaps that go with this system.

I don't have a lund dealer close.

Thanks for the help