cross-section edge shader

This is a screenshot of the cross-section that could be made using a version of shader types that were already thoroughly discussed on the forums here.
A distance along the section plane normal should be added to form a layer where the material gets tinted green.

I am just wondering how could be possible to get just a constant width outline instead of this greenish layer?

 

https://www.assetstore.unity3d.com/en/#!/content/66300 free?

 

Thank you very much.
But thiese shaders provide section fill - based on backfaces and with help of stencil buffer.
I would like to get the cross-section area outlined with a constant width wire.