It does exist. You're going from digital to analog though, converters can get expensive and are a little box typically. Not on a computer at the moment so I can't provide a link sorry! They do exist though!

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth