Hi Gary

Tough one. Those carbs were originally made for Mercruiser and Mercruiser only. They are now obsolete.

It can be rebuilt--dont swap it out or trade it in. Have them rebuild yours.

Otherwise its e-bay, craigslist, etc.

You have to realize you are now dealing with what is, technically, an antique engine. You have to approach your repairs more like restoration than maintenance, and that includes sourcing parts.

G'Luck

Kevin