There is/was a siding shop here in an older building. Not the mall area. They had a very long bench and an alum brake in the back. They said if you buy the metal from us you can use the brake for free. Yea, it was not a cut and fit and come back. It was first come, first to use. I got my dimensions and bent a lot of metal, cut length over size, then trim to fit at the house. Did the whole house and garage. I think it cost me about $100. Might ask around your area.
Craigslist around here is 80% idiots and scammers. It is the dregs. Hate to say it but FB marketplace has a lot more items and much better deals. I am not a fan of FB, but their marketplace is the best for used stuff around here by far.