Mo - I have 3 nurseries that have MM-111 trees in several varieties. Adams County Nursery ( ACN ) 800 - 377 - 3106. Ask for Jen Baugher. Great trees, big place.
Fedco - ( 207 ) 426 - 9900 and Boyer nursery ( 717 ) 677 - 8558. ACN & Boyer are in Pa., Fedco is in Maine. Cummins in N.Y. you probably have heard of on this forum. They have 'em too. ( 607 ) 592 - 2801.