The leather belting used in many coin operated pianos is available
from McMaster Carr as well as several other sources.  McMaster-Carr
part number is 6170K12 for 3/16" belting.  It is 78 cents per foot with
a minimum order of five feet.  1/4" belt is 6170K13 for $1.04/foot,
9/32" is 6170K14 for $1.23/foot.  The Atlanta telephone is 404-346-7000
or http://www.mcmaster.com/ .  Tandy Leather has leather belting
sometimes.

Don Teach