So at this point I really can't block him. We still have 2 business items to wrap up from the D.. unless he truly shows me something big
It sounds like this isn't a 30-day detox so much as giving him a chance to miss you and watching for him to offer something big enough to merit a reply? If this is purely business, a simple way to free your headspace is a message like this--
"Hi XH, I'd prefer to conduct business matters via my e-mail minus that one in-person meeting at the notary. I'll check my e-mail weekdays business hours. I'm blocking your personal calls/texts for my sanity. Thanks for understanding."