A friend of mine, David Hollinger, in Mercersburg, Pennsylvania, has
taken apart a large number of pre-1935 players and has stack units,
bellows units and some miscellaneous parts for sale.  Makes include
Standard, Simplex, Schulz, Otto Higel, Gulbransen and Aeolian.

I have posted the list on my website at this page:
http://osbornej.com/hollinger.html  There is a phone number and address
there for contact.  I may be able to arrange to forward emails to him
if needed.

Thanks,
Joseph Osborne
Carlisle, Pennsylvania, USA