Valve Cover Baffles

Use card stock. Cardboard is a little awkward. Cereal boxes work.

Those M/Ts have been out of production for some time. I don't think anyone would keep anything like that in stock.

I would have thought by now that someone would have come up with an oil pan baffle kit by now. Those are a little tricky to come up with from scratch without a template.

You'd be best off using Aluminum. It's easier to work with than steel. Doesn't have to be heavy. Even galvanized HVAC works. Cuts like butter with snips.