Info / Plans wanted : Oil Lighters

[Jors]

Hi,
I saw a home-milled fuel flint lighter on eBay yesterday.
It was a formal lighter and looked much like a formal Dunhill lighter, except the finish was smooth and it works with fuel rather than butane.
Since I am rather obsessed with lighters I think making a couple will be some good projects.

I am therefore looking for plans or sites with plans or ideas.

I am also looking for info on making a diamond grid like knurling, but for a flat surface (sides of the lighter).