Made by Walleva.
Turns out my Oakley Flak Jackets are in fact Oakley Half Jackets so my brand spanking new, just arrived from the US replacement lenses don't fit.
Walleva replacement lenses for Oakley Flak Jackets, mirrored titanium. Come in a little box with a lens pouch and cleaning cloth. Needless to say they are immaculate.
Any questions let me know.