Fortunately, for a character as prevalent to pop culture as Batman after more than 80 years of existence, these kinds of products are not so hard to come by.
Needless to say, when figuring out what you may want to pick out for the Batfan in your life, you probably should try to get a little more creative with your selection – perhaps something more on the practical side or a even unique modern art piece.
Now, it should be expected that any admirer of the Dark Knight probably has collected a sizable amount of DC Comics issues featuring the Caped Crusader, owns most of the Batman movies on Blu-ray (even Batman & Robin for good measure), and has a whole army of scale figurines built to resemble various iterations of the character (or even his equipment) set up all throughout their home.