Reddit mentions of Holographic Silver Color Coding Labels Round Circle Dots 1/2 Inch 1,000 Total Adhesive Stickers

never done anything like this myself, but i have some ideas to get around the hologram. works best if it's just 1 small hologram.

whether it's a hanging placard or a window sticker it's the same general idea. buy some holographic stickers and use an exacto knife or whatever you can to cut out a shape vaguely resembling the logo needed. the general shape is the important part, not the fine details.

now make it look like it's a piece of shit. peel back the hologram section of a window sticker and muck up your window where it would've been so it looks like the adhesive is crap, and obscures the hologram portion of the sticker.

if it's a placard they'll almost always have a thin plastic film over it that has the hologram. use a screen protector to imitate this. now do the same thing as the window sticker, and peel back the portion of the film that would be on the hologram, and be sure to get just enough dust and grime in the adhesive so it's murky.

be sure to borrow a friends so you can measure the sizes and proportions as closely as possible.

best of luck!