Contact one or more of  the following:

Chamber Stoves Website http://www.chamberstoves.net/ Todd White

Antique Stoves.com http://www.antiquestoves.com/chambers.htm

http://www.antiquestove.com/chambers.html

Hugh's Place http://www.hughsplace.com/parts.htm

Specializing in Chambers stove restoration:

Macy's Texas Stoveworks.  http://www.macystexasstoveworks.com/

5515 Alameda Rd,
Houston, Tx 77004-7443 or call 713-521-0934 or fax 713-521-0889.
                      or
Antique Appliance Trader <stoves@bscsystems.com>
                     or
jes@west.net