Colored GameBoy replacement cart shells?

Does anyone know where to find/buy these colored generic "Game" shells? I put together some GameBoy cartridge fridge magnets for myself & friends, but would love to do some Pokemon magnets too. Thanks for the help!

 

Aliexpress, chinese sellers on ebay, etc.
Unless you also need the labels but I guess that'd be way more expensive. You could print them at home/locally, a simple A4 adhesive sheet would fit a bunch of them.

 

Hmmm. I've dug through both, but can't track down anyone selling the colored shells without the pcbs. Most want 5$+ for them unfortunately. I've picked up the standard grey shells on Ali for about 50 cents/pc before.