A photo of your situation would help.
You’re unlikely to find new parts for that motor.
There are several vendors that cater to the antique
outboard hobby. Some are on EBay, and there was
a list posted by Tubs recently on others.
The spark plug wires can be replaced with care.
The primary and secondary coil wiring can be patched
up, or new wires soldering onto the old wire in some
cases.
The attachments show parts for a 1938 Sportstwin.
I don’t know if that is the same as yours.
Prepare to be boarded!