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Fake expanded metal

I'm attempting to create a material for expanded metal.

 

Attached are three files. A bitmap, Bumpmap, and first attempt at a file with the material.

 

The problem is that the end result does not line up the front, back and corners. Is there a way to make the expanded metal look right?

 

The work around is to make the metal 0 thickness and bending radius 0, but it does not really look right.

 

Note: in my case, Im trying to create 3/4" expanded metal. A scale of 0.35 appears to be about right. That expanded metal happens to be 0.1" thick.

 

Once I determine the thickness I will use for the finsihed product, then I can calculated the appropriate density to create fake expended metal that works just like sheet metal.