West Bend (and the private brands) had several style fuel fittings depending on the year or horsepower. Unfortunately there is no modern replacement unless you have the Chrysler/Force style that came out in the early 1960s. (Want to say 1963)
I believe your Muskie should have the first of the connectors in the photos below – your best bet with that style is to clamp a hose to the male fitting on the motor and adapt whatever fitting you have to it. It’s not neat but will get the job done. If you have access to a pile of Chrysler parts motors, you may be able to find a male fitting that will screw into the place of the older Elgin one. I was lucky enough to find one years ago but don’t know what model it came off – I suspect an early 60s WB 40hp. The male fitting has to be long & thin to work with the threading and length of the pan. Personally, I’d just go with the hose adapter until you stumble across the correct connector.
Typical West Bend/Elgin remote fitting – 1955+
Motor end
7.5hp F/N motors late 50s early 60s – I think this is the "fuel bowl" fitting you note on your Elgin.
Motor end
Early 1950s 16hp (The motors aren’t that common and the fuel connector is wicked rare!)
Motor end looks like the ’55+ but I don’t think they are interchangeable.
