air bumper guards

hey guys and gals,

do you know any site online or store where i can buy those two air square air cushions that mount to the rear bumper to protect it...i'm in nyc and of course all the parallel parking is beginning to take its toll...i'm specifically looking for the air cushions and not the bumper guard that gets "thrown" out the trunk, i think that's pretty tacky....thanks for your help as always!