I just bought a 35hp soverign, still trying to figure out what year. The motor is locked up, so I'm going to part it out on ebay, maybe the cowling will work for you?
Randy, the seal is available from www.nymarine.ca It is the same as a 1955-58 Johnson or Evinrude ("standard" '58's only) I believe he has it both in black and white.