I need to find a single metal bi-fold door. I replaced my furnace, and only have 1-1.5 inches of clearance to the flue. I have looked web-wide, but can't seem to find them. I know there is such a thing; I had them in an apartment years ago.
Anyone know where I can find them?

I checked Lowes, Home Depot, and Menards in Indianapolis; no go.

 

You are concerned with finding a metal door, but you say you only have 1 1/2" clearance from the flue. Is the flue triple wall per code? How close is the header for your door to the flue? Does the flue pass within proper clearances to the ceiling flammable surfaces? The only reason I am asking these questions is that the metal door won't save you if the door header which is wood is that close to the flue itself. Now, on the other hand, if the flue is triple wall, you could use a wooden louvered door. Louvered is the key since it must have free air flow for combustion in the chamber.

 

Single wall - same flue connection through ceiling as previous furnace - just different dimensions on the furnace and it makes the flue closer to the door. I currently have no door and a 2 year old ...