Expanded metal and perforated metal are not the same thing.

Lots of options on the internet. Thickness, holesize, flattened or raised,cut size. Do you know these things if you are trying to match the Moroso stuff? Prices I see at McMaster and other places would make me just get the Moroso stuff if you just need it for one pan.

Otherwise, I would still want to have a piece of the correct stuff to measure, so I know exactly what I'm looking for.