A3 Cat Girl?  That's just a tad vague.  There are several options already available.

Are you asking about "neko-chan" type characters, (essentially human-looking girls, usually in sailor school uniforms, having the addition of cat ears and a tail), or, are you more interested in a "hybrid" type figure, a lifeform having roughly humanoid proportions, but, in addition to the afore mentioned ears and tail, sporting an extended muzzle, claws, possibly digitigrade paws, eyes with slitted pupils and body fur?

Is it a freebie item or one intended for purchase?

Do you possibly remember the creator?

If you provide just a little more information, it will help a lot.

Sincerely,

Bill

Tempt the Hand of Fate and it'll give you the "finger"!