Seriously though, if you spray-paint bubble wrap black, then run a sponge of gold paint over top, that’ll just about do. I’d only worry about the spray paint somehow melting the thin plastic… and the inevitable damage to all your shiny bumps.
Do pre-strung sequins come spaced-out? I am unclear how those work. If their orientation can be fixed then you could get a little tool and snip each circle into more of a Pac-Man shape.
Oh - “honeycomb sequin” might do. Gold on black, then delete the bottom of each sequin.