I have a bathroom fan mounting bracket installed in the 70's that I do not have a fan motor for. I am trying to find a replacement or figure out how to replace the whole bracket. I've tried searching online but most kits seem based on dimensions or model numbers of the previous fan. I don't know the model number of the old fan and I can't seem to find a kit for these dimensions (9" x 7 1/2"):
I also cannot find a way to remove the bracket entirely, I think I would have to remove part of the ceiling in order to do that. I would prefer replacing the motor and grille but can't seem to find one that fits.
Do you know what fan motor might fit this bracket?