Which fountain pen model would you also consider as mechanical pencil?

Good morning everybody,

the title basically says it all. Which mechanical pencil version of a fountain pen would you also consider?
Either for aesthetic and design or functional reasons?

I think a lot of them are pretty pricey for what they are in the end (sssh fountain pens are obviously different /s) yet I'm in search of a nice mechanical pencil to accompany my fountain pens.

Or would you rather look towards "standalone" staples in the mechanical pencils like a Kuru Toga etc.

Thanks and have a great day!