[s-cars] Rubber strips on bottom of doors. Replacement?

[tom at tomwintermedia.com]

Guys, I'm cleaning up the S6 and I have - due to the car's provenance from
New England and the salted roads - some rusting and peeling of the rubber
strips that go along the bottom of the doors. Car is a 96 S6 Avant.

I'm wondering what the list thinks in regards to:

1. Sourcing the appropriate parts
2. DIY replacement.

This project doesn't seem like it should be too tough, at least easier than
a timing belt, so I'm pretty confident that I can do it right with a bit of
been there-done that advice.

Thanks in advance!

Tom '95 S6 Avant