Amazon.com: Y.D.F N64 to HDMI Converter, HD Link Cable for N64, Nintendo 64 to HDMI Compatible Nintendo 64/ Game Cube/SNES/SFC(Plug and Play, no Power Supply Required.) : Video Games
Nintendo 64 N64 Ultra HDMI NTSC HW2 | eBay
This expensive adapter makes the Nintendo 64 look good on modern TVs - The Verge
UltraHDMI | RetroRGB
UltraHDMI - Enjoy your Nintendo 64 with modern HDMI