Need gift ideas for a Metallica fan🎸

Hi everyone!

I’m looking for a birthday gift for my boyfriend. He’s a huge Metallica fan (especially James Hetfield) and Metallica is one of the main reasons he started playing electric guitar.
I don’t know much about Metallica or guitar gear, so I’d love some advice from people who do.
I’m not looking for a T-shirt or a mug. I’d love something unique that a Metallica fan or guitarist would genuinely be excited to receive.
Any ideas are welcome.
Thank you!