CJ, I know you're a bit out of your depth with 'confusers' and I'm right there with you!
But, I want to point out that there are now companies that will take a plan (digital version of your sketch) and cut them out with a laser/plasma/water jet
then press brake them, and ship within hours in many cases.
I know that -Send, Cut, Send- now offers bends along with their cut service, but I don't know the thickness limitations.
There's dozens of online job shops with brokers like Xometry as well.
You may have the abilities to make all those neat cuts.
I'm just pointing out options available through this 'newfangled information superhighway'
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.