Stamping Bella has a lot of curly-haired girls. I'm partial to the Tiny Townies, personally:
Tiny Townies
They are rubber stamps with cling foam attached.
If you are open to digital stamps, Mo Manning has a really fantastic collection that includes a lot of options:
Multicultural - Page 1 - Mo's Digital Pencil
Some of her designs are in physical stamps via Penny Black (for example:
Penny Black - andrea and raul)
Another digital option is Some Odd Girl's Piper character:
https://www.someoddgirl.com/collections/piper
Piper is a bit older, but really great for teenager card because she's portrayed in fun activities like listening to music.
There are also some really fun fantasy characters from Some Odd Girl (like
Peter Pan and Tinker Bell or a
sorceress in training or
Aquarius) if you wanted to go the magical route.
My Favorite Things' Pure Innocence line has a curly-haired girl stamp, too:
https://www.mftstamps.com/products/p...10ab817e&_ss=r
The Greeting Farm has several curly options for both boys and girls:
https://thegreetingfarm.com/collections/characters
And their digital line has even more variety.
I also really love this set from Right At Home:
https://www.rightathomeshop.com/righ...ppa-friendship
It's great for winter cards.
Hope that helps.