The House of MinaLima is THE BEST spot to shop and see real props from the movies! It's a partnership of two graphic designers Miraphora Mina and Eduardo Lima, who are the actual designers for all the props in the movies! Think the Marauder's map, tom riddle's diary, Hogwart's acceptance letters, Daily Prophet newsletters, and more!
So while there are a ton of Harry Potter souvenir shops, this is the one to go to as it's part museum and part shop. They have props like Daily Prophet Newspapers, letters in the fireplace, book covers, and posters everywhere! If you can't make it out to the Warner Bros Harry Potter Tour and Set, this might help fill in for it!