The general forum seems like a legit place to post—I see no prob with it. After all, Reason is a ReWire slave to a ReWire Master, usually being one of which that hosts VSTs. Thus, VSTs, while not directly supported by Reason itself, are related elements to the Reason user experience when speaking in terms of ReWire. Also, Rob Papen now makes REs, so it's even more relevant.
Sorry for the unnecessary justification, but it's interesting to think about. Good luck on your search. I also agree, with the release of the RE, the opportunity to find folks looking to sell may be greater in these forums.