
Both the parents are without an affix (kennel name) that serious breeders usually have to identify the dogs of theri breeding like a trademark or surname. Usually when one refers to a breeding line you use the affix to describe it.
Do you have the Grandparents and other relatives with the same word in their names, usually as the first word or the last if they bought the dog into the kennel.
As an example my affix is Barbelka, and all my pups will have this as the first word of theri name.
My youngest is Barbelka Iskra JW, her mother is Ch Barbelka Eliksyr, her mother Barbelka Calusek, her mother Barbelka Amorek, and her Mum my foundation bitch is Eskamere Yarla at Barbelka (she came from the Eskamere Kennel).
It rather sounds like your breeder was a one off breeder or not someone seriously involved with their breed, so may well no longer be breeding.
Any litter that you see the parents shoudl ahve their Hips scored with a result in the low teens or preferably signle figures (that is in total both hips added) the sire shoudl also have a certificate to shwo he has been tested clear of Haemophilia. I would contact yoru nearest GSD club and seek advice and names of reputable breeders. Visit the breeders to see if the type they ahve pleases you as there are different types beign bred.