http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5987364664&category=45449&rd=1 Why not just make a regaular one instead of the Robot Masters version?
I'm guessing the Robot Masters KOs are coming out because one of the bootleggers has access to molds from Takara's factories. As for the upsizing, well, KO makers seem to love making their toys bigger or smaller, either to avoid problems or just because they think it makes their product stands out, who knows?