Flattened dimension as custom/config property of a folded config for BoM

I have many folded parts in an assembly. I have Thickness, Width and Length as custom properties that are shown in their respective bill of materials (BoM) columns. However getting thickness and length can be taken from the folded configuration that is used in the BoM but the flattened config is not used in the BoM but this is where I can get the Width as this is the flattened dimension.

So is there a way - work around or not - to get a flattened dim in a folded config for use in the BoM?

SolidworksSheet Metal