Another avenue you ought to explore is getting in contact with the CoS itself and see if they have anyone who could translate the book into hungarian. I understand how difficult it can ber to get rare books and ones in English that you simply cannot find anywhere else. I'm still looking for a decent Avon Books version of the Satanic Witch that I don't have to pay over cover price for so i'm checking every bookstore in the area that i live trusting that eventually my judgment will pay off in my favor and I'll have the compleat set of LaVeyan books TSB, TSR, and TSW.

HAIL SATAN!