We bought a new house with lovely curtains, which keep falling down. The curtain rail is white plastic and curved, and is attached to white brackets on the wall using these little white plastic gizmos (you slot them into the curtain rail, then turn them sideways to attach into the bracket). The problem seems to be that lots of them are missing so the remaining ones aren’t enough to hold the rail up. Any idea what these little bits are called or where to buy them?