Black shepherds aren't uncommon. Try a local gsd specific rescue or get in contact with a local breed club and get to know the breeders they use. Shepherds have some health issues and you'll want to really understand them and how to obtain the healthiest possible animal.
Omg i need one! Where did you find an all black shepherd?
Oh what a cute 'lil pup!
I actually grew up with gsds but they were standard colors. I didn't realize black ones were kinda normal. There is a gsd specific rescue in my city, when we're ready to get another ill have to check with them :)