I desperatly wanted a black rack and fittings when I ordered my car last year, but was told by the factory that it was just not possible.
Looked into getting my rack powder coated, but the problem was that the supplied bushes would no longer fit without some filing down. If you get it wrong the rack can be a loose fit, which results in another unwelcome rattle.
Didn't bother going black in the end and was quite happy with my silver rack....until now
Might need to get in touch with that nice Mr Evans...