I'm from Slovenia, hehe. It's nice to see more Europeans here. Just a little heads up, this is a very rescue oriented forum and advertising for breeders is not allowed, that's why moderators will probably delete the link you posted. There are sadly many backyard breeders out there, responsible breeders are very rare, that's why it's best to have the same rule for everybody. But I do know Lievore's Edition kennel, it's one of the better Amstaff kennels in Europe, I really like their dogs.
Do you have any pics of Maia? Who are her parents? I really hope you will stick around here so we will have the oportunity to see little Maia grow up
Good luck with her!