I remember seeing the ad for "all colors" plastics, was quite some time back, forget the name. I think they went under or got sued. Some of the more popular manufacturers like UFO, Acerbis, maier, clark I beleive are under license to copy bodywork and also under obligation to only make them in company accepted colors. So nowadays your pretty much confined to green, flo green, black, and white....or paint them yourself (which doesn't last long)...or custom graphics that cover the entire pieces.
I contacted maier one time and asked them to make me fender in a certain color, they refused. I said whats the big deal? You already have the colored plastics beads and the molds, you couldn't take a box of my color over to the correct mold and make it? They said, technically, yes, but no they won't do it, before I could say anything else they hung up on me.