Thanks to Robbie for info about the QRS Playola keytop player.
However, we're kind of back at square one -- there don't seem to be any
of these things on the market near as I can tell.  And, as I already
have a keytop roll player (under restoration) I'm wondering, has anyone
attempted to adapt such a thing to MIDI input?

It seems like it hadn't ought to be that difficult, but if anyone
has done the ground work, it will of course make it easier for anyone
wishing to follow behind.  MIDI is still a mysterious sector of reality
for me, if suggestions could be made regarding helpful literature, that
would be nice.  Thanks in advance!

Lee Rothrock