Bill and Dee Kavouras ask about a keytop Vorsetzer that has MIDI.
QRS has the "Playola" that is a keytop player and has MIDI ports.
They work very well, although cost about $5000 retail.

Another method would be to use a Marantz Vorsetzer and get a MIDI
converter that is also available from Bob Baker Electric Orchestras
in Libertyville, IL.  His address is <elecorch@aol.com>.  The MIDI
converter (MC-2) sells for about $600, and the Marantz Vorsetzers
are regularly available for under $1000.

Grant Leonard