The plastic circular bellows used to be a catalogue item from the
firm of Nancy Fratti music box restoration suppliers in the USA.

Best of luck
Michael Start
AutomatomaniA
London

 [ From an advert in a recent MBSI Bulletin:
 [
 [ Nancy Fratti
 [ Panchronia Antiquities
 [ PO Box 210, Whitehall, NY 12887-0210 USA
 [ tel.: 518-282-9770
 [ fax:  518-282-9800
 [ email: musicbox@sover.net
 [
 [ -- Robbie