scale alternator

hi guys! i hope someone can help me. im currently building the tamiya r89c, i like the majority of the kit parts, its just that tamiya always neglects those alternators. you get a tubular thingy with a pulley. not very nice! it really detracts from the look i want to get. since i build mostly group c cars, all their alternators are really exposed.
so the question is where can i get really nice 1:24 alternators?