1994 Sea Ray 220BR SS Heater box

[Trips]

Hi all, my beloved Sea Ray is still all snugly tucked away until spring so I'm hoping to be able to get an answer before unbuttoning her or having to go in early. This spring I need to replace the heater/blower box but of course didn't write down the part number last fall, nor can I find the info online. I have a parts list for the boat and a part number for the box, but it no longer cross-references anything.

Any help out there?