Troy Duncan said in yesterday's MMD that he needed an Eckhardt musical
Christmas tree stand collar.  There may be others, but I know for sure
that Gary Stevenson at Studio 801 has cast-iron Christmas tree cups
available.

He can also customize the mounting hole to fit almost any maker's stem.
See: http://www.studio801.com/Cast%20cups00.htm 

Gary's contact information:
    Gary Stevenson
    Studio 801
    801 Eichelberger Street
    St. Louis, MO 63111-1648
    Email: garyg@studio801.com.geentroep (delete .geentroep)
    Cell phone: 314-753-8607

Don Caine
Music Box Repair Center Unlimited
Lomita, CA