The surround is made out of 3-pieces (left, right, rear) and U-shaped pieces were bent to attach the surround to the walls. I had the pieces professionally cut and bent (all out of a single 4'x8' sheet) since stainless is such a bear to deal with.
I also have a fan that pulls cold air off of the floor and pushes it up between the wall and surround then over top of the wood stove. This helps to keep the temperature close to uniform from floor to ceiling.