I have discovered you can buy a kit with several shapes of brow stencil, some pencils and brush and powder for filling in, so when I have received and tried these, I may or may not appear in public with beetle brows. We shall see.
In America they sell much more of this kind of stuff, including false brows made of human hair. However I think these are probably intended for people who have lost hair due to medication.
I never cease to be surprised.