Floor protector help!

[IHopeYouStepOnALegoPiece]

I have a desk chair with a base identical to this one. I need floor protectors so attach to the chair (rather then a floor cover). I found some months ago the were clear plastic that ran along part of the leg, fitting snuggly to it but I cannot find them anywhere again.

I also need ones for these type of barstool. I can’t find anything to work for either!

TIA