Material that's very close is listed here
https://www.mcmaster.com/products/sp...-steel-strips/ It apparently comes hardened, so you might need to anneal it before manipulating.
Stacking them after each cut doubles the number of pieces from next cut, and reducing 10' into manageable segments will go fast.
Next, I'd whack them to width with an 0,045 cutoff wheel. I find the cutoff wheels can be used to execute fairly nice cuts, so feeding the strip thru a jig up to a stop, clamping it in place, then a guided cut to zip off each one might just be precise enough. Annealing wouldn't be needed in this setup.