I'm with you on not being too thrilled about cows milk. If I had my way, Shane would never taste the stuff. But I don't have it only my way.
I would go with a good quality organic toddler formula and possibly consider some benefical supplements as well to put in that bottle she loves so much. That way you can be sure she is getting all her nutrional requirements.
ETA: of course doner milk would be the very best thing if you can swing that. If not, organic formula