circulation

Does anyone have a part number and seller where I can buy a circulating pump for my 2006 Sea Ray Sundeck 240 with a 2020 Mercruiser 350 engine?

I just replaced a pump using Merc 8503391, with brass impeller and stainless back cover The back looks like this, with 3 holes on the side where the big hose attaches. The top 2 holes are for the bolts and the third is a water passage I used Felpro gaskets, assembeled everthing, and when I...