How about NES joy-cons? I played around with the idea on the Photoshop : r/ NintendoSwitch
Nintendo Switch is getting wireless NES controllers | Mashable
New Nintendo Switch Custom NES DPAD Styled Joy Cons and Backplate | eBay
Classic NES Themed Nintendo Switch Joy-Cons! - YouTube
ColorWare Reveals NES Themed 8-Bit Nintendo Switch Customised Controllers - My Nintendo News
Nintendo Switch Online Trailer + NES Controller Joy-Con Replacement! - YouTube
Use Nintendo Switch controllers with the NES Classic with this adapter | TechCrunch
Nintendo Entertainment System Controllers - Hardware - Nintendo Official Site
Custom Nintendo Switch Joy-con Controllers Retro NES D-pad - Etsy Canada
Custom NES Nintendo Themed Nintendo Switch Joy-con Joycon - Etsy
/cdn.vox-cdn.com/uploads/chorus_image/image/53597625/6_Joycons.0.jpg "NES Classic Edition's best wireless solution adds Nintendo Switch Joy-Con support - Polygon")
NES Classic Edition's best wireless solution adds Nintendo Switch Joy-Con support - Polygon
Joy-Cons vs. NES Controllers: Which should you use with NES Nintendo Switch Online? | iMore
Nintendo Switch NES JoyCons: Release Date, Price for Nintendo Switch Online EXCLUSIVE - Daily Star
Custom Nintendo Switch Joy-con Controllers Retro NES - Etsy Canada
Nintendo Entertainment System Controllers - Hardware - Nintendo Official Site
/cdn.vox-cdn.com/uploads/chorus_asset/file/13639016/jbareham_181219_0826_nes_switch_0026.jpg "Nintendo Switch NES controller review: Great for one thing—that's it - Polygon")
Nintendo Switch NES controller review: Great for one thing—that's it - Polygon
Nintendo Switch Joy-Con Charging Dock, 4-in-1 High Speed Charger Station Stand with LED Indicators for Joy Con & Nintendo Switch Joy-Con NES Controllers (Switch Wireless Version only) | Walmart Canada
Nintendo Switch Joy Con Controller, Neon Purple/ Orange | staples.ca
Joy-Con & controllers
Nintendo Entertainment System Controllers - Hardware - Nintendo Official Site
/cdn.vox-cdn.com/uploads/chorus_image/image/65831569/Screen_Shot_2018_09_13_at_6.17.06_PM__2_.0.png "Nintendo Switch NES-styled Joy-Cons are 50 percent off for the holidays - Polygon")
Nintendo Switch NES-styled Joy-Cons are 50 percent off for the holidays - Polygon
NES Controller / Joy-con Size Comparison : r/NintendoSwitch
Review: NES Controllers for Switch Provide Authentic Feel, Not Much Else | Third Coast Review
Nintendo Switch Console Joy-Con NES Retro Skin Vinyl Skin Decal Stickers Covers 778469659571 | eBay
