Well I did find a supply shop that I can get the putty pads from. However, looking at the townhomes that are ahead of mine in construction, it looks like the builder is putting the putty pads on. The only weird thing is they just slap in on the back of the outlet and cut the rest away. The sides never get covered at all.
John, is this just sloppy work. Is the soundproofing compromised due to only the back of the outlet is covered with putty and not the sides? I figure I would just buy some pads and put them on the sides myself. Think this is a good idea?