The Petite Godin 3721 is the coal/wood version of the Godin 3121 wood stove. The manual is available on the Godin website (http://www.godin.fr
) but only in french. Use the site's search box to find 3121 or 3721 to get to the manual. If your stove is a coal burning 3721 it should have a small plate on the bottom of the cylinder near the back that reads:
No. 3721 FAB 0C
POELE A BOIS BRULE TOUT
The model number, a code for the fabrication date and the French roughly translates to "Stove that burns wood and everything"
In the manual for the 3121 you will see some gray sections that refer to the modifications for the coal burning 3721.
I have found the best source of parts is in France, the stoves are still popular there. Some French web sites will ship smaller parts here.