Prentke Romich Company
http://www.prentrom.com/support/article/963
Replacement Puff Switches used with the Headmaster were at one time discontinued, although by popular demand are once again available for purchase through our Sales Department.
The Headmaster has been discontinued, therefore many replacement parts are becoming very difficult to come by. If you need replacement parts for your Headmaster, please contact PRC Sales for availability.
The number for PRC Sales is 1-800-262-1933