Aeolian Orchestrelle valves should have the facing replaced with leather
the same thickness as the originals, most modern materials just don't
seem to work as well in the long term so don't risk a quick fix.

When I order Organ leathers here in UK from Russells Leathers they will
send me a sample chart for me to choose from or allow me to send a
sample of the original for them to match.

I hope you can find a supplier in USA.

I have 3 new 58 note TEST rolls left for Aeolian or Wilcox organs if
anyone needs one.

Kevin McElhone