That's cute, but sorry I've not seen anything like it. Maybe just knit a plain cup cozy and then skinny tubes to sew on for the arms (maybe I cord)? The hands would be a little more complicated but I bet you could do it.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper