welcome, and again, knowing what port you hail from is good to know.
is there a part number on the back of it ?
this might be something that you could make yourself if it came down to it.
if anyone in your area does sand casting. You could have a couple made out of aluminum.
OR - find a piece of aluminum, delrin, nylon, etc. that size for a blank and hand cut
the teeth with a saw blade.
To a lot of us, that is part of the fun of working on old boats and motors.
Fabricating a small part like that by hand - and having it work as good as the original.