My bad news is that when I had to repair the vertical tambour materials in my 71 Caravel
, I had to literally dismantle the entire cabinet system to get it out and back in. I mean, even had to take the countertop off. Airstream did some really strange assembly in some of their specific trailers. In some you have to do that same total disassembly to get the furnace out for service or replacement.
So, don't be surprised if there is no easy way to do the tambour. Been there, done that and it was not fun.