Can anyone help ID the pictured tub overflow fitting? It is cemented into the elbow with the flange inside the tub. There’s a gasket behind the flange but no ability to mount a standard 2 hole cover. I’m upgrading the tub kit and am stuck on this right now. I can’t find a replacement cover for this piece and can’t think of a way to convert the pipe without tearing open an access panel (2nd story above the stairs, not easy!) Ideas, knowledge?!