The rear baffle of my stove seems like its getting worn out around the cut out where the pellet feed chute is. The square cut-out seems to be getting larger around the bottom and right edges causing ash and debris to go in and its just not burning right. I've tried to purchase a new back baffle but cant seem to find one where I dont need an entire $600+ dollar upgrade kit. Has anyone else had this issue before? Is there a way to fix mine like by welding a bead around the chute area in question? Or does anybody know where I can buy a replacement? Even if its pre-owned. My exact stove is the Mt Vernon Quadrafire Original Pellet stove and the serial number is 1775799. Thanks in advance for your help!