MD was purchased by the company that bought Bryston. That group is now HQ;s in Dwight Ontario Canada.
The MD tech that worked on ALL MD products is in Toronto and available to fix MD gear. He may work for the company that bought MD.
He posted his contact info on another MD thread on A'gon (search).
I purchased the new MD ST-3 antenna from this new company (I have 2 ST-2's) for my 3rd tuner. I bought it in January, and it was delivered in Aug. They blamed the tariffs.