My cat had kittens and they all died. I want to find someone who has newborn kittens that we can abopt 1 or 2 for my cat to raise. I need to know how long before my cats milk dries up, considering that there are no kittens currently drinking off her.

Mastitis in cats | Cat health | Pet health (http://www.nutrecare.co.uk/pet_health/cat_diseases/mastitis_in_cats)

Remove the bed where she had the kittens, anything that would have a kitten scent; decrease her food by 10%. Her milk should dry up in about 2 weeks, but keep a close eye on her nipples for redness or swelling which could mean mastitis is setting in. Read my link above. If you notice any swelling or redness, a vet visit would be in order. Usually antibiotics are prescribed for this condition.

I hope you are considering spaying.