I have an old Morso 1125 that has so far been a great stove. The fire brick on the sides has started to crack and fall apart this past winter, I want to replace it all before starting it up this year so I don't crack the metal. Can I just buy bricks from my local tractor supply store and fit them, or do I need manufacturer specific brick? This is an old, obscure stove so I don't know if I could find originals. If I buy generic ones, I will have to cut some to size, don't even know if I can do that without breaking them. Also, do they cement in, or just kind of wedge themselves in? Thanks for the help.