I ended up with a duplicate, and just 'cause I'm a nice guy, if any (North American) cuemaker need one I'll ship it to you gratis ... ya just gotta convince me that you need a 5/8" R8 collet. And, like I said somewhere else, if'n ya do a good job of convincing me I'll toss in a couple of chunks of White Tail and/or Mule Deer antler, big enough to make a ferrule or joint ring or two.
Dave
Dave