Xbox 360 HDMI Converter, Xbox 360 to HDMI Converter HD Link Cable for Xbox 360, Xbox 360 to HDMI Support 720P / 1080P, Compatible with Xbox 360 and Xbox 360 Slim: Amazon.co.uk: PC & Video Games
HDMI AV Cable + RCA Audio Adapter for xBox 360 (HYS-MX3075) - China Hdmi Av Cable +Rca Audio Adapter, Rca Audio Adapter for Xbox 360 | Made-in-China.com
Microsoft Xbox D Connection HD AV Cable - Japan - DHL 1 week to USA | eBay
Xbox 360 HDMI AV Cable - Unboxing - YouTube
NEW Xbox 360 - Component Audio Video Adapter (KMD) HD HDAV YPbPr Cable Adaptor | eBay
Gamer Gear RCA to Composite Cable - RCA AV to composite Converter Cable for Xbox Original Classic Consoles - 1.8m Audio and Video RCA Cable for TV Games : Amazon.co.uk: PC &
For Sky XBOX 360 Mini HDMI to HDMI 1080P HD TV AV Video Out Cable Lead on OnBuy
Xbox 360 HDMI Conversion Kit review: Xbox 360 HDMI Conversion Kit - CNET
Amazon.com: HDMI Cable for Original Xbox 360 Console, Xbox 360 to HDMI Aadapter with Component Signal Output (Better Image), HD Converter : Video Games
HonHe HD TV Component Composite Cord AV Audio Video Cable for XBOX360 – BargainFox.com
Y.D.F Xbox 360 HDMI Converter, Xbox 360 to HDMI Converter HD Link Cable for Xbox 360, Xbox 360 to HDMI Support 720P / 1080P. Compatible with Xbox 360 and Xbox 360 Slim.:
Digital Optical Audio Adapter Converter + 2M HDMI Cable fits Microsoft Xbox 360 | eBay
YITROX AV Svideo HDMI to HDMI Converter Upscaler, 3RCA CVBS AV Svideo R/L HDMI to HDMI Converter Scaler Support 1080P for Wii, PS2, PS3, Xbox 360, Blu ray Player, DVD and More:
Xbox 360 HDMI Audio Adapter : Amazon.co.uk: PC & Video Games
L/R Optical Audio Adapter for Xbox 360 - DiscoAzul.com
HDMI VIDEO CABLE + OPTICAL AUDIO ADAPTOR SET - - for Xbox 360 - - Free Postage | eBay
This is how I got HDMI + surround sound from my 360 back in the day : r/ xbox360