Bent frame, what are the best alternatives here?

Hi all! I have a iPhone 6 with a screen flickering. I am replacing the screen, and selling it! Problem is, the phone has a large bend on the bottom. Screen almost fits, but there is a lot of air between frame and screen. I have the gtool icorner, and i was thinking i could invest in a head for the sidewall instead. Is this availabe somewhere?

The bend is pretty bad, and it goes trough the bottom of the phone. It is not just on the top where the gtool will straighten. I can also replace the housing, but that is of course a much bigger job, and i would hope straighten it up with gtool would work. What do you guys think? See pictures bellow! Ask me if you would like me to provide pictures from other angels.

Here you can see it with the screen mounted! There are no bottom screws installed here.

Thanks!