IS DOMETIC AWARE OF ANYONE WHO STILL MANUFACTURES A THREE-PRONG OUTBOARD MOTOR FUEL LINE FITTING FOR AN OUTBOARD THAT USES A PRESSURIZED FUEL TANK?

This is an old three-prong fitting for a Johnson/Evinrude metal tank that included a line for pressure and a separate line for fuel. It’s probably at least 25 years old if not older. VintageOutboard.com is a company that did still stock these as of 11/08.