Here's a couple of links that may help you....
Bottle-feeding and hand-raising newborn orphaned puppies, whelping supplies, and recipes for supplementing new born orphans - from Chinaroad Lowchens of Australia
Also....
Bottle Feeding Puppies
This is just awful that it happened. I'm sorry for your loss. Post any questions you may have. This is such a critical time for the pups. It's an exhausting job but it can be done.
I find an eye-dropper works better than a syringe. It's easier to feed them (with the eye-dropper) without their aspirating the formula.