You won't find a threaded stem to fit oversized bars. If you're looking for track drops, I think you're SOL because the only black track drops I know of are oversized. I do have some road Dedas (maybe 215 shaw drops?). I really don't like the shape of them, actually...both too shallow and a weird angle on the top of the drops.

They're black, though. (Ooh, and I got them for a steal versus retail.)

For stems, there are a few. I've seen others, but the one that comes first to mind is the Cinelli frog. It might be a little too modern looking for that frame though.