I found a couple things, both bad... In the BBR FAQ section, they state that no one other than Yamaha is offering injection molded plastic for the TTR125, and only in the stock colors. The Acerbis site lists a black (or white) front # plate available, but lists nothing available for the sides or the fenders. Seems kinda odd, given the popularity of these bikes. Heck, if you can get (*Ack!) orange plastic for a 426, why not black for a TTR?
Hmmmm, Krylon Fusion plastic spray paint.....I just may give that a try. I think what I will do is paint an extra fender but take a stocker with me in case the painted one starts looking "painted" after a couple rides.
Maybe one of these days I will be happy with a bike in stock form, the way it comes from the factory--NOT! :-)