There is one of Richard Coyle’s replica Star Trek III Communicators on eBay now. The auction was brought to my attention and a quick email to Richard by Don from the Star Trek Prop, Costume & Auction Forum confirmed this. Richard had an original to cast off of, but made certain changes to make it easier to reproduce.
Still a nice piece and probably worth $ 150 or so. Richard Coyle and Ed Miarecki props from the 80’s are still in demand by replica collectors.