Have you made sure that your dog has been done so this won't happen again and there will be no more unwanted puppies?
I would advertise for good homes for the puppies as shelters are overcrowded as they are. Make sure you don't let them go until they are properly ready to be separately from their mother, 8 weeks old at the least.
Make sure you vet potential owners and homes for them to make sure that they are going somewhere decent to someone who will look after them properly and won't just leave them while out at work all day, make sure they get all their vaccinations etc...
If it were me I'd make sure they were properly vaccinated before they were given to new owners.
As a last resort, try the Dog Pages...
http://www.dogpages.org.uk/sth-east.htm
Could you get a rescue place to help advertise them but keep them in the meantime so that the rescue place can concentrate on animals in more need such as strays or mistreated ones. Are there any friends or family who could help?
If they have to take them, could you donate some money towards their keep and vaccinations?