I don't actually recommend a face-to-face without a mediator present. Usually the WAS will try to bully the LBS into something that is not in their favor.
Better perhaps to say let's keep this to email, and tell him you will send him your proposal tomorrow (or whenever you will have had time to run it by your attorney).
Consider also the possibility that he's pissed off his attorney (or not paid him) and that's why you haven't heard?
