I found someone else selling this:
https://www.etsy.com/listing/4306447767/elden-ring-game-boy-game-boy-color-gba?ls=r&ref=hp_rv-1&content_source=ecc2621908402184f4f0b10d8f4e9b6141fa13e5%253A4306447767&logging_key=ecc2621908402184f4f0b10d8f4e9b6141fa13e5%3A4306447767
