I picked this up. This was really designed for a Gas Sport boat but i think with a little mod it could work on a sport 40.
I checked out my PT 40 and will work if top and bottom flange were flattened out some.
$18.95 plus shipping(connection tubing also available) its has a 5/8" inlet and outlet.
I have more on order but for now
I only have 2 available.
Here Is The Link Also