How to unfold an impossible part ?

Hi,

I received this part from a customer, and I need to unfold it.

First I tried to remove and delete all the faces that would make it impossible to unfold, but still no luck.

I am pretty sure the side that got a bend as shown in this picture makes it impossible to unfold - but what can I do ?

I have attached the original file without my modifications.

I hope someone can help me with this challenge - I am pretty stuck :-/

SolidworksSheet Metal