Slotted Metal Sheet?

I'm in the process of refinishing my DL-44 Greedo Killer (upgrading to a Denix base) and I'd like to make a proper display for it when it is done. I'm wanting to use a piece of slotted metal sheet as a backdrop, like this:



Every source I have found for it so far only sells in bulk. I really only need a piece roughly 12"x18"... Anyone know of a place I could get something like this?

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