Hi Chris,
I've just looked it up in the EA21 Parts Catalog (you can find it under "Manuals" if you have not already done so). The Part Number is 48110-70G11-5ES. Putting that into Google seems to find a Russian site that ships parts to Japan!!! Anyway, it may be of some help.
Btw, no mention of different colours in the Parts Catalog, so you can have any colour you want, as long as its black