pretty sure there's not been a recent reissue. He was released as part of the Classics Heroes line in the UK and Europe in the early 90s, but IIRC the official line is that Sunstreaker is unavailable for reissue, just like the Dinobots. Don't own the KO (or original, for that matter) so sadly can't help you with a review, but there might be some on youtube?
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Astrotrain, Sunstreaker, Sideswipe, or 3rd Party iGear Ratchet and Ironhide.
Also looking for Universe Repugnus and Overbite, Frostbite and Longhorn and any Webdiver toys.