It's just my opinion, but I think the tambours are a pain in the neck. I kept most of mine because they were in tact, but the kitchen area in my 72 Overlander had them all busted up, so I tore them out. I will be replacing them with a more conventional door made of 1/4" lightweight luan ply covered with vertical grade white laminate. Much easier to keep clean. Tambour is a dust collector.
I know most people are trying to restore their trailers to the original look, but I have decided to modernize mine. Instead of all the dark woods and funky fabrics, I have painted the entire interior white, and am accenting all of the cabinetry with an aluminum look. Kind of high-tech. I will be adding color to the couch, carpets and window treatments and using a nice berber carpeting and maple wood flooring. I've redesigned the entire front layout of my trailer. New couch area, countertop with entertainment center, and pullout added storage space. I'll be posting updated pictures soon.
I say try something new for that shelf, unless of course you are trying to maintain the original look. There are many places to purchase the tambour if you so desire. Tambour is also easy to make. It is just a series of thin strips glued to a fabric. Pretty simple, but time consuming to make. Easier to buy of course!
Good luck with whatever choice you come up with.
Totally addicted to Airstreams!
1972 27' Overlander
1992 GMC Suburban