Looking to buy fire doors?
If you are looking for "fire-rated doors" (i.e. - between garage and home), then Home Depot and Lowes carry them in stock. I believe they are 1 hour rated. Realize that these are comprised of the door, in the frame, as a fire-rated door is the whole door arrangement (not just the door slab/leaf).
If you are looking for a higher rated (90 minute + rating) fire door, then something like that would have to be ordered from the previously mentioned places.
Alternately, a high rated door system, may be in stock at a commercial supply house, that specializes in interior materials (like sheetorck, ceilings, steel frame and doors).
- Build Well -