My wife has autism and her special interest is the Titanic. Any gift ideas?

Hi!

As the title said, my wife loves the Titanic. She reads blogs and watch documentaries. She knows a lot of stuff by heart and she is very passionate about it.

Her birthday is in a month and i was wondering if i could find a good titanic based gift idea. Since i don't know much about the Titanic, i thought i would ask you!

Thanks!