I don't know about a font that looks like the logo, but I have seen a really good one that came with an Opeth theme I downloaded a long time ago. I believe it was the font use on the inside of one of their albums (haven't seen the font in a really long time so I don't remember which one) but try looking for an Opeth theme wherever an Opeth theme is available and check to see what font it is. You can also choose to just download the font individually.