Bending the F631A Channel

Hello All,
I have reached the point where I need to bench the F-631A Channel flange from 88 degrees to 92.5 for the canopy frame. My understanding is that this applies only to the outer flange.

What tool did you use to bend the flange around the curved portion? I have a good set of and seamers, however, they're wide and not idea for the curved portion of the channel.

Thanks in advance for your input.

Made a tool...

I used a sacrificial pair of vice grips. Smoothed and radiused the jaw edges and removed the serrations.

Good call thanks for the reply.