I have a shower door that needs new rubber sealing between the door and frame because it has been discolored and is pretty worn out. Any idea where I can get it? I've tried the home centers. Any possibility I could find it at a plumbing supply store? The door is in good shape just needs cleaning up. I've also thought about just caulking the edges instead but I know that will have to be stripped and re-done just like the shower.