Try http://www.pets4homes.com. We have 2 dogs. One Staff that we got as a puppy, and one American Bull that we got as a rescue.
The American Bull is the most docile dog i’ve met, soft as muck. The only issues we have (which we’ve nearly defeated) is that she lived in a box room for 90% of her life before us so struggles with not eating her pap after she’s dropped it. We guess that she either had to eat it to hide it from her previous owner or ate it because she was starving. It used to be every day, but she only does it once a week or so now.
The Staff was a puppy we got at 8 weeks. He’s a spoilt, needy git and seems to think he’s a lap dog. No real issues though, both can be left alone, both are great with kids (but i wouldn’t leave any dog alone with a child).
In conclusion – I’ve had both a puppy and a rescue, and would get both again. You’re welcome.
(I’ve posted these before, and one of the female members went off on one telling me how dangerous these breeds are – she must have just put down the daily broadsheet)