You can bond just as well with a non traumatized dog and even more so because the dog will have the ability to be calm for you. Yes, Bristol has her issue with dogs and now kids (because of parents not controlling their kids!), but she has already well proved she has the ability to do this, loves the work, and knows her tasks. The dog issue is she just wants to meet and play, but it comes out in frustration when she can't get to the dogs. I firmly believe with age and impulse control training, this will improve. As far as the kids, it was my fault for continuing our day after the one incident, therefore putting her into more situations where she was over stimulated. So this weekend we are taking a break, staying at the house. I will slowly reintroduce her to kids, so she knows they aren't a threat.
My opinion would be to either find a reputable breeder who has either bred good Service/working dogs before, or find an older puppy (8 months to 2 years) that has the SD temperament (make sure you get it tested by a trainer who has worked with SDs before) and you bond well with. You want one that isn't overly hyper, but not lazy. You want one that wants to pay you attention and responds to you. I picked Bristol myself from the SPCA, but she had been fostered well and I got her for a "few week trial" first and had someone who has trained SDs and therapy dogs before temperament test her and try training her to sit. Within 10 minutes Bristol could reliably sit and lay down, even with another dog around!
Just be patient and you will find the right dog. I'm sorry you are having difficulties right now, try to continue to use Jersey at home for now. My two chihuahuas were/are GREAT emotional support animals and helped me get by until I got Bristol.