I need to put about a 30 degree curve into a piece of sheet metal U channel,
curve needs to have a radius of 100mm.

Channel is 75mm wide x 15mm deep with 15mm flanges, made out of .75mm sheet.

I dont have access to rollers - not sure how they'd be any use. I've got an
hydraulic press brake, plus usual workshop tools.

Any thoughts would be greatly appreciated.