Hi M.,
I feel like maybe you shouldn't stop nursing just yet. Maybe just give it another month or two, and maybe she'll stop on her own. My older 2 kids stopped themselves at 13 months and I have a 10 month old son that is showing the same signs of wanting to stop soon. Have you tried giving her something in a cup? If she has never taken a bottle, I wouldn't introduce that now. My kids took one on occasion, but not regularly. She's probably close enough to 1 year old that she could probably try out regular milk, or maybe mix it in with some formula, as well. Why start on formula this late in the game? She might get attached to it and then you'll have an unnecessary expense.
I have been giving my kids the farm fresh milk for a while now and they LOVE it! There are no hormones in it and it is very good. I think it has a much better taste because it's in the glass bottles, too. Milk in the plastic jugs seems to have a funny plastic-y aftertaste. Anyway, those are just my opinions because I, too have been through similar situations. I thought they'd never want to stop nursing, but they did it and it was in their own time.
Hope this helps,
Liz W.