Heater motor ring thingy

I am looking for the ring that goes on the firewall side of the heater motor for non a/c.

It's round and has one flat side and attached with 4 nuts. If you have the nuts, I'll buy those too.

For a 72 demon, so it has 4 bolt holes. Should be the same as any 67 to 72 non a/c cars

20211217_200843.jpg