I recently had to replace an existing exterior door with a fire resistant door. The door enters from a garage into the kitchen. Anyway, all went well with one exception. The entry from the garage is brick and the brick mold of the replacement frame (or the frame itself) is about 2" shorter than the old opening on the exterior side. The interior side fits perfect. So I now have about a 2" gap between the top of the brick mold and the steel lintel. I'm looking for ideas on how to trim out that gap. TIA.