My solution: (similar to a couple of the other posts).

www.spaco.org/Press.htm

Pete Stanaitis
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Winston wrote:
I want to bend up some ~12 ga. CRS but
I don't want to buy or house a big brake.

I need 6" width maximum.
After Googling over the past few days,
I have not located a chunky little brake
that will do that for me.

Can you recommend a tool that will
do that please?

Thanks!

--Winston