Does anyone out there know where my club can get hold of the right paint for the Yonex all-England mats that we use? The club are thinking about putting tape down, as they have been told they can only get the paint from Japan! Thanks.

Unfortunately I think what they've been told is correct.
However, you may want to find out from your regional distribution hub just to be sure.
When in doubt to straight to the source. Yonex in Europe. :)
Sorry I can't really help.