Could you use a hand edge roller to get just enough bend to slide the rear piece under the forward one? Or on a bead roller you can make a joggle to accomplish the same thing...I waited way too long to get a cheap Harbor Freight one and I use it for a variety of things. I do have a lathe and make my own dies to match what I want to do but you can offset a cutting die and accomplish a nice fit for up to 0.025 2024-T3. It also works nice for kydex panels....just a thought.
I hung mine off the edge of a table and clamped a piece of 2x with about 1/16" more than required sticking out and used two of these I got at Home Depot to cover full length at same time.
They also make cheap hand brakes, not sure on how much width they will accommodate.