Need help with 2205 motors

So I've crashed a good number of times now with my 210mm drone and for some reason I've lost two C/E Clips (not exactly sure which one they are) on two of my Motors and I can't seem to find replacements because I don't know exactly what size they are. The only conclusion I can come to is to buy new motors which seems like a big waste of money considering these still work fine, on a 3's battery at least. It's just now that whenever I crash, the motor Bells fly off and expose the delicate windings. I'm also afraid that if I upgrade to 4S, the extra power will actually pull the motor Bells off mid-flight.

My motors are 2205 racerstars

Thanks in advance!

Thank you!!!!!