If the ceiling board is smooth and either flat or curved in only one direction, then I would have thought that using a laminated version might be better, because it will be tougher and more resistant to any damage or marks. I would expect that an exposed paper surface would inevitably get damaged and deteriorate, and would then look very shabby.
The encapsulation used for the folded laminated OS maps you can buy in shops is probably too rigid and not sufficiently flexible for your needs (even if you could get it rolled up rather than folded).
I would recommend that you take a look at the custom versions of the OS maps available from Aqua 3 (https://www.aqua3.com/index.asp), because they are very thin and flexible. I have one that is folded, and it feels like it is printed onto a thin, tough plastic sheet rather than the three layer encapsulation used on the standard OS maps.
According to their website they are available mounted onto a PVC whiteboard (as well as flat and folded), and it might be that the whiteboard itself is sufficiently flexible and light enough to allow it to be affixed to your ceiling board.