Adafruit Industries HDMI to RCA Adapter w/ NTSC/PAL Switch - Micro Center
3-In-1 HDMI Cable for GameCube, N64 and SNES — Gametrog
Amazon.com: 3RCA AV CVBS Composite & S-Video R/L Audio to HDMI Converter Adapter Support 720P/1080P for PS2 PS3 NES SNES Nintendo 64 HDTV : Electronics
Amazon.com: HDMI Cable for Super Nintendo SNES, Super Famicom SFC Console : Video Games
How to connect your retro consoles via HDMI - YouTube
The 600 Game NES Classic Retro Game Console (HDMI/AV Support) | Nintendo Core
Original Xbox to HDMI Converter, HD Link Cable for Original Xbox, Xbox to HDMI Support 1080P/720P, Compatible with Original Xbox. | Walmart Canada
Review: OLD SKOOL AV to HDMI converter for the NES, PS1, N64, Dreamcast, VCR & more - Hackinformer
3 Best NES HDMI Cables You Can Buy
Hyperkin M07373 3-in-1 HDTV HDMI HD Cable for Nintendo GameCube - Walmart.com