How to identify faucet handle brand/model?

My kids somehow broke the bathroom sink faucet handle. I’d like to replace it but I can’t identify the brand/model based on the markings. There’s a part number 93903 on the bottom that I’ve been trying to google (and amazon), but no luck so far.

If it’s not possible to find this same part, how do I find a proper replacement? The guy at ACE hardware picked out a handle for me, but it didn’t fit.