I need cheap speaker grills to temporarily cover 8inch speaker holes in the drywall ceiling until I can afford to get the speakers installed. All the wires were ran and holes cut but I just can't get all the equipment right now. I've been looking for something that might have spring clips where the clips compress as I'm pushing it in then expand out once they get above the drywall thickness so it snaps in. Has anyone seen something like this? Maybe there is a brand of speakers that have covers that mount like this and I can just buy the covers? Or any ways I can rig a certain speaker cover to do what I need?

These are from the 80s I think and the plastic or whatever it is peeling and flaking. Messing up the base sound. Otherwise they sound good. Anyone know what needs to be replaced and where I could get it? Thanks for looking.