GSDR don't usually adopt to people with children under 7, but that's not an absolute and it's always worth enquiring. You have nothing to lose. [email protected]
There are other breed rescues dotted about, some better than others tbh, and most all-breed rescues will have a GSD or more available, sadly for them. If you opt to rescue, avoid those which don't neuter, vaccinate, homecheck (for YOUR benefit as well as the dogs and not as rudely intrusive as it sounds), offer ongoing support and give a written assurance that they will - indeed must- take the dog back if ever you are unable to keep him.
Independent rescue is more likely to judge on a case by case basis than to have a blanket policy about rehoming to young families.
My white chap is 7 1/2, so on the older side by GSD standards, whose average lifespans are about 12 years. However he's a real pup in many ways, playing ball and tug, running around and play-fighting with my 3yo GSD. He has settled in here over the past week as if he was born here and already views me as Mum, very attached to me. With that in mind and my experience of adopting and fostering older dogs I think it's fair to say that an older dog can bond just as well as a younger one. He's very affectionate and soppy with my teenaged DDs too.
Added to this an older dog, especially one from a family background, is likely to be less hard work to the more inexperienced owner. You'd avoid the weeing and chewing that comes with a pup or younger dog and he should have some basic manners and training too, making lead walking, off lead recall and acceptable behaviour so much easier. An older dog is also far more likely to be gentler and more laid back, which is important of course if you have young children. Too many times we hear of problems because a young dog is play-nipping or has knocked a child flying in his exuberance and thus have the owners banging on rescues' door, determined to get rid of their pet.
Good breeders - any breeders apart from the wicked puppy farm sort - are not my area I'm afraid. As a rescuer I only get to pick up the pieces and see the results of the bad breeders' actions.
Do you mind if I ask which county you're in? I can't promise but I MAY be able to suggest a rescue.
Oh... and if you haven't one already, buy a Dyson!!!
I am seriously thinking of buying another to keep upstairs (am both lazy and have a dodgy arm which makes carrying painful), just so I'm not caught out when my current Dyson gives up in disgust at the flaming dog hair!