Let's say I sell fountain pens (just an example).

I might have many potential customers among people who like the Facebook page "WeLoveFountainPens" or "MontBlanc Facebook page" (famous pen manufacturers).

But I'm not the owner of these Facebook pages (it could be a concurrent for example).

Can I start a Facebook ad targeted on the audience of people who like "WeLoveFountainPens" and "MontBlanc" Facebook pages ?

This would generate high conversion rates, and would make people who advertise happy, is there an option for this in Facebook?

Note: All I've found is creating an audience with interests, but this is too broad, and I cannot find my specific market niche in it.