Bill Chapman is asking about thin cork gasket material.  This is
stocked in sheets of 1/16" thickness at Kimber-Allen, in Swanley, Kent,
UK.  Their web address is http://www.kimberallen.8m.net/.  This company
is "trade only", but if you are an amateur not working on church organs
they should be able to help.

Regards,
John Page, UK