You can build-your-own Switch with custom Joy-Con in Japan - 9to5Toys
Custom Matcha Green Tea Themed Nintendo Switch Joy-Con Controllers – JOYPOP
Limited Edition Nintendo Switch Joycons Custom by Dreamcontroller | Proudly Customized in the USA with Advanced Permanent Hydro-Dip Technology (Not Just a Skin)(Nintendo Switch Console not included) - Walmart.com
Custom Animal Crossing Themed Nintendo Switch Joy-con Joycon - Etsy
Nintendo lets Japanese gamers build custom Switch bundles | Engadget
Custom Candied Nintendo Switch Controllers Custom Joy-cons - Etsy
Gameboy Retro Custom Joy Cons for Nintendo Switch – The GameChangers
EPIC SWITCH JOYCONS!! Custom Fan Designs - YouTube
Custom Nintendo Switch Joy Con Controller Skin | Create Your Own Nintendo Skin