There’s no chance I’m finding a spare, so…
Overhead projector acetate sheets, copper tape that’s conductive on both sides, a whole punch, a straight edge, an x-acto knife…. And my cheater (magnifying) glasses.
A couple of hunched hours later:
@MookyTroubadour In case *you* are wondering, I'm genuinely impressed.
Now I need to go to the FedEx store and have them print me the top sticker part in the exact size I need, and laminate it. Phew!