Stick on Maui makes vinyl car decals that I keep on seeing everywhere. For whatever reason, their Hibiscus flower and Honu (he's a turtle god) stickers seem to have resonated with the general population.
Although you can buy their stickers in a lot of stores, they usually only carry them in white. Stuck on Maui's website sells them in a bunch of other colors, including chrome. The prices are the same as in the stores, and shipping is free!