EDIT: I wrote this before I saw patrickjames post. I'm going to check out that supplier myself. $9 is a bargain!
A bargain no kidding! When I saw these I almost p@@ped my pants and ordered two immediately to cover my beloved Sonnars. The finish on them is very high quality. They are more durable then my original Contax caps, and the guy sends them fast, although he is in Japan.
Anyone with a Contax, Kiev or Nikon should pick several of these up. You would be crazy not to.