I'm seeking information which would help me rebuild a Popper mechanism
in a Geyer player piano.  It plays a 13-3/4-inch Popper Konzertist roll
(shown on p. 273 of "Treasures of Mechanical Music", by Art Reblitz).
The actual mechanism is pictured on p. 583 of the "Encyclopedia of
Automatic Musical Instruments", by Q. David Bowers.

The round drive belt is 98 inches long.  Any suggestions on a belt
replacement?  My customer is looking for rolls, also.

Carl Kehret