I have him in hand, he is frigging AWESOME! You *have* to get redwing - in vehicle mode its the best paintwork I've seen on the Siege line, and actually reminds me a little of thrust's red. In robot mode, he looks bad-ass, and the smirk is just perfect.
I did just see he's available from Target US if you wanted to use a freight forwarder Hypnos. I suspect bigbad and tfsource will get him eventually.
On the lookout for MISB Headmaster Highbrow, Takara or Hasbro. I'm sure I could make you a sweet deal!