This Wii HDMI adapter plugs into the output socket on your Wii console and lets you use any standard HDMI lead to connect to the TV instead of having to fiddle around with the older cables which are also lesser quality.
eBay
Full HD 1080P WII to HDMI Converter WII to HDMI Wii 2 HDTV Converter Wii To HDMI Adapter 3.5mm Audio for PC HDTV Monitor Display
Aliexpress UK
Wii to HDMI Adapter Converter (Wii2HDMI). ✔ HDMI Output: Converts Wii video/audio output to 1080P HD HDMI. ✔ Universal Compatibility: Works with all Nintendo Wii consoles. ✔ Audio Support: Includes 3.5mm stereo audio jack for headphones or external speakers.
eBay
WII to HDMI Converter Cable HD 1080P WII to HDMI Adapter Converter for PC HDTV Monitor Display Wii To HDMI-compatible Adapter
Aliexpress UK
Wii2HDMI a great mini converter for the Wii console, outputs video and audio in full digital HDMI 720p or 1080p format and supports all Wii display modes (NTSC 480i 480p, PAL 576i). Video and audio in full digital HDMI format, no transmission loss!
eBay
WII To HDMI Converter Full HD 1080P WII To HDMI Wii 2 HDTV Converter Wii To HDMI Adapter 3.5mm Audio for PC HDTV Monitor Display
Aliexpress UK
Wii2HDMI a great mini converter for the Wii console, outputs video and audio in full digital HDMI 720p or 1080p format and supports all Wii display modes (NTSC 480i 480p, PAL 576i). Video and audio in full digital HDMI format, no transmission loss!
eBay
WII To HDMI Converter Full HD 1080P WII To HDMI Wii 2 HDTV Converter Wii To HDMI Adapter 3.5mm Audio for PC HDTV Monitor Display
Aliexpress UK
Wii To HDMI-Compatible Converter 1080P Full HD Adapter Connector 3.5mm Video Audio for PC HDTV Monitor Wii2HDMI-Compatible. 1 x Wii to HDMI-Compatible Converter. Input: For Wii AV Connector. High quality, state of the art motion adaptive de-interlacing for 480i ,576i input.
eBay
WII to HDMI Converter Adapter Full HD 1080P Wii2HDMI Video Converter Cable for PC HDTV Monitor Display Wii To HDMI Adapter
Aliexpress UK
Wii2HDMI a great mini converter for the Wii console, outputs video and audio in full digital HDMI 720p or 1080p format and supports all Wii display modes (NTSC 480i 480p, PAL 576i). Video and audio in full digital HDMI format, no transmission loss!
eBay
WII to HDMI -Compatible Converter Cable WII2HDMI For HDTV Monitor Display Wii to HDMI Adapter HD 720P/1080P
Aliexpress UK
Don't forget to enter settings and change the screen resolution from 480i to 480p. If you switch the Wii to 480p mode, they may work in an HDMI compatible manner. Output resolution: 720p / 1080p (whether the high resolution can be achieved depends on the input signal).
eBay
Bitfunx HDMI Adapter for Nintendo Wii NTSC PAL Retro Game Consoles HD Connector Plug And Play
Aliexpress UK
1 x For Wii to HDMI Converter. Video and audio in full digital HDMI format, no transmission loss! Audio embedded in HDMI, also passes through to 3.5mm jack. Output: 3.5mm Jack Audio/ HDMI Connector.
eBay
2.4G/5G Wireless WiFi Display TV Dongle Receiver HDMI Adapter 4K Display Dongle Mirascreen TV Stick for For Android IOS to TV
Aliexpress UK