Roller doors or similar for a warehouse?

[PhilM]

I have built a simple very low relief HO modern warehouse to go along the front edge of a layout and it can be seen from both sides. Has anyone got any ideas about buying some doors that are 2 sided? It would be nice to buy something with all the sliding rails and other mechanism but that might be asking too much and I could probably bodge something if I can just find appropriate material for the doors. Because the back/inside of the door will be very visible, up close, I am thinking it needs the relief provided by plastic rather than simply sticking a print out to some card. I intend to model some doors open (to frame the view) and some closed.

Thanks!

Phil