You can use a piece of stainless steel wire and twist it into the groove until you can find the c clip
Went by lowes today. Seems to be the right size, maybe a smig Thicker but should work. I'll keep and eye on it and will post if they don't last.
Sorry for the bad pic.
My dad always called these Jesus clips - when you pop them off it's always "Jesus! Where'd that go??"