You may also want to check with the Ridgeback folks for help finding good homes. They won't be happy with the situation, but will appreciate the fact that you are making an effort to find the pups good homes.
http://www.rrus.org and http://www.ridgebackrescue.org

They also have a great forum for RR owners, you might also try posting there.
When I first adopted Rusty our RR/Lab mix, they where a great help. Rusty was a bit of a problem child in the early years and they were always there to help.

I'm sure the Pitt folks also have some strong support groups you may wish to check into.

I'm sure you know that you have two breeds there that aren't for the average dog owner. You NEED to screen any possible adopters to make sure they understand what will be required to raise and own one of these pups. Other wise they could easily end up at the local animal shelter's euthanasia table with in the next year or so.

Please post the location (at least which state) the pups are located.

Good luck