.Thanks, everyone, for the kind words!
I bought 2 tambour door hardware kits and cut them to fit. The hard part was fabricating the slats, making a suitable pressure jig, and gluing the slats to fabric. I used Douglas Fir throughout the trailer, and wanted the tambour doors to match.
You can buy entire kits, as long as you like the wood (or metal) that's offered. With some basic skills and a lot of planning, I think many people can make these (without being a retired cabinetmaker with lots of time in the winter). Here's one of many sites that sell these:
Appliance Garages & Wood Tambour Doors | CabinetParts.com
So, these are practical and fun to use. I don't want to hijack this thread, but I'm glad to answer any questions that anyone might have about the process. Just send me an email (PM) and I'll do my best.