I need one as well. My home's floor furnace register was converted to an air intake register when C/HA was installed years before I bought the house. It has an old 20" x 30" register that is an eyesore in the middle of the hardwood floors, but that cannot be covered up (because it is the air intake for the C/HA!) I've looked extensively in the hardware stores, C/HA shops, and on the 'net, but cannot even find a replacement, much less one that is decorative (say wrought iron with a pattern of some sort?)
If anyone has a solution, other than going to a custom iron shop and having one made, please let me know.