Duster Rear Window Louvers

Has anyone ever had one of these windows out and laying flat on a table... is there any arc to the glass?

Having the bends cross vertically these plates are going to be dead nuts flat... I don't know how this might effect fit.

To arc the metal to match the window you would have to roll it slightly then weld the complete louver in... good luck keeping it in the shape you want after adding all that heat.

I can see this being a bit of a stumbling block...