There are only 4 MARs in the United Kingdom. Helpful Links.
eBay
AVplay HD-300 99.99% Silver Customized Hi-end HiFi Audio DAC DDC CD I2S IIS RJ45 Digita Wire Player Connect DAC 4K 8K Cable
Aliexpress UK
Internal CD to Motherboard Audio Cable, 45cm. Condition is New.
eBay
High Quality USB 3.0 to SATA Adapter Converter Cable 5Gbps for 2.5 3.5 Laptop Hard Disk Drive SATA HDD SDD DVD CD-ROM DVD-ROM
Aliexpress UK
370mm Universal CD-Rom to Sound Card Audio Cable Lead Locking H4PL (black) to JST4PL (white). The cable uses a H4PL connector one end a JST4PL on the other. End 1: H4PL Plug. End 2: JST4PL Plug. Internal CD-ROM audio cable for connecting CD-ROM/DVD player to your internal sound card or motherboard.
eBay
High Quality USB 3.0 to SATA Adapter Converter Cable 5Gbps for 2.5 3.5 Laptop Hard Disk Drive SATA HDD SDD DVD CD-ROM DVD-ROM
Aliexpress UK
P/N: 67JDG. There are only 4 MARs in the United Kingdom. Condition: Refurbished - Full working order.
eBay
New Style For 2.5” 3.5” SATA SSD & HDD Laptop Hard Disk Drive DVD CD-ROM DVD-ROM USB 3.0 to SATA Adapter Converter Cable 5Gbps
Aliexpress UK
P/N: 455GE. There are only 4 MARs in the United Kingdom. Condition: Refurbished - Full working order. Warranty: 12 Month Warranty.
eBay
Vention 3.5mm Jack to 3 RCA Cable Male Audio Video AV Cable AUX Stereo Cord 3RCA Standard Cable for Speaker TV CD DVD Wire Cord
Aliexpress UK
This was from a desktop computer from many moons ago. If you are into retro computers this is used to connect a dvd or cd drive
eBay
YYAUDIO HIFl stereo RCA Audio cable 6N OFC Male to Male 2RCA to 2RCA Audio Cable with Gold Plated connector PlugFor CD Amplifier
Aliexpress UK
This cable is designed to connect a CD-ROM DVD-ROM drive with an MPC-4 connector to a SoundBlaster audio card. Internal CD-ROM to SoundBlaster Audio cables are great for connecting your CD-ROM drive directly to your SoundBlaster sound card, thereby bypassing processor usage.
eBay
RCA Y Splitter RCA Female To 2RCA Male Audio Cable Dual RCA Male Stereo Cord for Car Audio Subwoofer TV CD Player Home Theater
Aliexpress UK
This cable is used to connect a 5.25" CD-ROM DVD-ROM drive to your internal PCI or on-board soundcard. This will then allow you to plug your headphones or speakers into the 3.5mm jack connection to get full stereo sound from the front of your machine.
eBay
Japan original FURUTECH flagship FA-αS22 OCC audio signal cable 2RCA CD power amplifier cable AV copper RCA audio video cable
Aliexpress UK