I assume it still is available for purchase from an AD — I purchased the Spectre brushed bracelet several years ago for my 300MC for about $750 (which surprisingly, was $200 cheaper than the standard bracelet). Don’t know the part number, I’m afraid, but your AD should be able to look it up if it is still available.
It’s not clear from your post whether you own the PCL bracelet or not. If you do, a much cheaper option is to have your watchmaker brush it — would probably be $100 or less.