Need help connecting a couple flanges

I have a part I'm working on, that I need to connect 2 flanges that are currently separate from each other, w/ another flange. I've uploaded a screenshot showing where I'm trying to add the flange. I've also included a SW2013 prt file & a step file. I tried adding a lofted flange but it doesnt allow me to get the correct flat pattern. I've played w/ edge flanges but cant get the shape or angle right.

SolidworksSheet Metal