Yes , many left the factory with electric start.-----A donor motor is the best way to go.---The 22 cubic inch from 58 to 1976 all had similar parts.------New parts may well be out of reach.
part 126256 -----Starter bracket alone lists at $321 US----I would look for a donor motor for say $150 to get everything.----Not sure of the tools in your workshop. ---Yes if you have the time and skill you could make some parts.