I am fixing up a house that has the old-style floor registers that had been used with an old gravity furnace. The furnace and ductwork were upgraded sometime in the past -- apparently the 1950's. I need to replace several of the floor register boots. I do not want to change to a new (smaller) register or move the registers to the walls since this would require trying to match and replace the extensive parquet floor.
Is there an on-line location to purchase 10 x 12 inch floor boots, or do I need to have a local sheet metal house make them up for me?