Some folks have glued new canvas on the back side, but that requires making the slider slot wider, or carefully sanding the edges of the tambours so that they remain slim and slide easily.
I have the tambours from my Sovereign available. The white ones from over the fridge now, from over the sink later, and the dark ones from over the closets in a couple of months. They are all in good shape.
I even have them from under the pullout bed. These appear in good shape, but are difficult to slide.
Zep