I wish there was post I could think of where someone got boots for their cat, but I can't think of one, other than Fripple who critters mentioned, for his hind foot. There was Captain Jack the Pirate Cat, but his was an amputation.
I checked Orthopets and they do prostheses but apparently not boots. Therapaw doesn't seem to have anything small enough. (I am aware of this size problem, having a chihuahua.) Since people do not usually buy boots for cats, you might search under "chihuahua boots" or "tiny dog boots" if you are googling.
I think you are going to end up in one of those situations where you try several things and maybe have to return several that don't work and get your money back.
I see some on eBay that are being modeled on cats.
Vetwrap is an idea. You would have to reapply it every day. I think that is what they use when they send a cat home after declawing. You can probably get some from the vet, or PetsMart. If you are going to use vetwrap, it is very important no
t stretch it when putting it on. Cut a length of it, like maybe 6", and loop it around the paw two or three times and a little way up the ankle so it is snug but not stretched, then enclose the whole paw in your hand and sqeeze. The vetwrap is self adhesive, it will gum onto itself and form a custom fitted glove.
This boot from Walkin' Pets comes really small. The XXS size is for a 1.25" wide paw and they velcro around the ankle.https://www.handicappedpets.com/walkin- ... -and-cats/
This one, too, and it looks softer.https://www.handicappedpets.com/walkin-traction-socks/
I don't know if this is an option, but what about padding her environment instead of her feet? Do you think the bottoms of her feet would hold up to soft carpet? The new style in houses is tile floors everywhere, or laminate. At my house I have area rugs everywhere on the kitchen floor, bathroom, foyer, anyplace there isn't carpet. I'm just trying to think whether your cat will get kitty litter inside her boots when she goes to the box, and will the "sand" in her shoes be bad for her feet. You might need to use something like Yesterday's News litter if she is going to have shoes. Also, I have one cat who insists on putting his front paw in the water bowl and flipping it everywhere. He wouldn't be able to wear boots, I don't think, or he'd have at least one wet paw all the time that wouldn't dry.
Neo-Paws makes some really tiny ones. This one has XXS that is .75 " wide, that is probably too small for a cat, you might have to go up a size. Actually they say they have XXXS and it isn't on the chart. Size chart is down at the bottom of this link.https://www.neopaws.com/catalog/summeri ... -1908.html
This one called EZ-Paws is supposed to be easy to put on and take off, and it comes in 6 sizes. No velcro, they just pull on. It would be tempting to try if it comes small enough. I think a cat would prefer not to have velcro tabs on her ankles, the streamlined fit might be better. https://www.neopaws.com/catalog/bootssh ... -c-39.html
Don't know if any of those would help, but I do know from experience, if you find something that's perfect for your handicapped pet, buy extra, because you never know when they might go out of production. Tammy's and Teddy's is a good example. There used to be a gal who made a special style of dog diapers called Pouch Pants and you can't get those anymore, either. I stocked up on extras of the diapers that fit my dog, hopefully a lifetime supply, so I don't have to worry.