Thanks for the replies. I cleaned the rim with simple green first and then acetone. It was definitely squeaky clean. You can see the pictures of what the rim cross section and measurements look like in the link provided in post #1 . 16mm didn't work, it slipped and the edges of the strip curled over itself. Now I'm stuck between 10 and 22mm. The 10mm would fit snug in the rim well, but the 22mm will cover the entire bed. Keep in mind that in the diagram, inner rim width isn't accurate because it doesn't account for the rise in rim well.
Like this:

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It was worth a shot.