The pull cord material is available and so are reproduction rubber tiller handles for that motor from North York Marine http://www.nymarine.ca/index.html . As for the gas cap, keep your eyes peeled for a parts motor. Basically the same cap is used on the 2?, the old 5 from 1941 - 1953, and probably any 3 horse from 1952 - 1967. See the attached images for examples.
The gas caps were red with knurled vent cap for most of the 1940s, then black after that. They have a small chain attached to a wire retainer that keeps the cap from accidently dropping into the lake.
