I like this idea.
Really like that gauge.

Thought about doing this myself.

There is a water jet shop up the road from me, but I figure it would cost more than my trucks are worth.
Wouldn't hurt to go ask em.

My plan was to get a scrap piece of 1/4" plywood or plastic and make the pattern.
If it comes out good, then I'd try the turned aluminum.
Pretty sure the hardware store or tractor supply would carry it.
I couldn't justify the cost of stainless on my old trucks.