Organic Formula? Advice??

K.
I have been EBF my 12 week old but have recently went back to work. My stash of frozen milk is slim due to a weekend trip with my husband. I am trying to build it back up but wanted to have an organic formula on hand in case of an emergency. I don't want my husband just giving her anything. The thought of the f word(formula) makes me cringe but I was wondering if any moms use organic formula. My LO can be gassy so wanted to avoid something that would make her more gassy. She might not even get a bottle I just want to be prepared. Any advice??