Piano under string felt

Hi, I'm presently under going a total restoration of a Bosendorfer grand and cannot find any suppliers of under string felt ( semi firm - pressure bar end of string) in the correct 'Olive Green' colour. I'm based in New Zealand and would appreciate any pointers as to where I may be able to obtain some.

felt can be dyed? red is the usual but maybe you could get white or contact the factory?