Curious. The harman XXV manual lists over 50 parts but is notably incomplete. Regardless, it appears that main structures in a pellet stove are in fact sheet metal and do indeed account for a majority of the stoves internal structure and to a much smaller degree some of its moving parts. However analysis strongly indicates your offer of sheet metal combined with my spare parts would not be sufficient, as you state, to make a whole stove. Additionally material requirements aside, the absence of fabrication tools combined with your offer presents challenges that would be difficult if not impossible to overcome.