Another idea would be to change the bezel around the keypad. The outsides are the same dimensions as a two-gang Decora style faceplate. The center portion needs to be cut out and then an Uno will fit. I did this for two of mine, using brass faceplates.
The key was using a dremel with a cut off wheel and making the initial cuts slightly in from the desired edges. Then using a finer wheel to get it exactly to the correct edge. Looks perfect, even I was surprised how easy it was.
Otherwise, get a hold of Russound for some replacement kits.