I am sure there will be some knowledgeable folks around soon.
However I have to ask. Why do you want to do this?
I am guessing it is to avoid the frog-dog GSDs that the show people have developed.
While that is very reasonable, you see this same crippling distortion in European lines as well
http://www.youtube.com/watch?v=SRU8UdMnssU&feature=related
So simply importing a European dog doesn't side-step the issue.
Of course many breeders have imported European working lines and either:
#1 started breeding euro working lines here.
#2 combined the euro working dogs with solid dogs with good temperament here to make a better family companion
#3 bred their euro import to anything and sold the results to uniformed consumer who magically thought any euro blood meant a good animal.
There are some really good dogs here in the USA that are 4th or 5th generation of imports. There are also people who have great connections and DO import dogs. What do you think is lacking in the grandsons of the dogs imported from Europe, or what do you think is lacking if you go to a person who has imported dogs from Europe before?
No offense intended, but in my experience with other breeds, people who wanted something imported from Europe but wanted to do it themselves had some misguided notion of saving money. That isn't the case at all. In addition to having never dealt with all the paperwork and logisitics of transporting a dog, often the people who are breeding QUALITY dogs in other countries don't send them off to random strangers. It's only after the foreign breeders have gotten to know the requester that they'd even CONSIDER the request. Also there is generally a high demand for quality dogs. Breeders who are producing true quality have a lot more buyers than puppies. Why would they choose to sell to a random stranger vs friends and business partners?