This will be challenging because fewer than 1,600 were built.  (It's essentially a Kaiser Henry J built for Sears.)  Watch Hemmings Motor News (hemmings.com) and ebaymotors.com, but these are long shots.  It might help to join the Kaiser Frazer Owners Club (kfclub.com) and network with other members.  It wouldn't hurt to place a want ad in Hemmings or Old Cars Weekly (oldcarsweekly.com).