With thanks to Gail Moss, a long time fan of MTW, who posted this info on our Facebook page in late 2022:
"I called on November 8, 2022, and spoke with an employee. This is his current information."

Cornerstone Talent Agency
Michael T. Weiss
37 West 20th Street, Suite 1007
New York, NY 10011-3706
USA

Phone: (212) 807-8344
Fax: (212) 807-8662

With thanks to Ask Dr. Mike's West Coast Office, who contacted the agency first week of December 2024 to verify that.

She got a charming young man on the phone who told her: "We don't have much contact with him but we do represent him. We accept his mail and can forward it." He confirmed that the correct address is the one we have.

Mike's definitely gone off the grid. I hope he is living a life that makes him happy. That's the best we can hope for.