Aptamil, Cow & Gate and SMA all do the little readymade bottles with teats in our local supermarket.
DC1 wouldn’t latch and I had formula in. I expressed for a year for her. Having it in meant I could relax and not worry about her starving. Stress affects supply 
DC2 won’t take a bottle (awkward sod) but on the rare occasions I’ve not been there due to emergencies she flat out refused expressed milk, took about an ounce of Aptamil, then nearly a full 200ml bottle of Cow a& Gate - she likes the cheapest stuff 
She’s weaned now, so I’d just tell whoever had her to bing her a yoghurt or some porridge.
She was in neonatal and we were on a transitional ward for 9 days, although they said they didn’t provide formula if you were intending to breastfeed, they did on this ward. They also provided nipple shields too, which are apparently banned on the normal postnatal wards.
This was Leeds GI, in April this year.
Good luck in doing what’s right for you and your baby 