Not sure what the "P" is about. Maybe ask Harry Nicholson or Sam Vance, not necessarily in that order.
Gas cap fits many other Evinrudes and Eltos of the time period, even a cap off a 4 HP Fisherman or Sportwin would work.
Lower unit nose cone – which one is which?
One is circa 1930, the other circa about 10 minutes ago
Best,
PM T2