I guess I should have explained a bit better....
Take a portable CD player (Battery powered such as this https://www.amazon.com/Coby-Portable-Compact-Anti-Skip-Player/dp/B00WLITCTY/ref=sr_1_3?keywords=portable+cd+player&qid=1567524727&s=gateway&sr=8-3)
Get a male to male stereo plug like this https://www.amazon.com/Essager-3-5mm-Audio-Stereo-Headphone/dp/B07L6K9DXW/ref=sr_1_1_sspa?crid=2BJB3CIX0XBPG&keywords=stereo+cable+3.5mm+male+to+male&qid=1567524834&s=gateway&sprefix=stereo+cable%2Caps%2C224&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyOFFZVFdUTFdXSksmZW5jcnlwdGVkSWQ9QTA5MTgxNjQ0M1UzRFlCQlhZSkQmZW5jcnlwdGVkQWRJZD1BMDM2NTg0ODJKVFRCUEVHTU1KSEYmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
Put your CD into the player along with batteries. Put the male to male stereo cable into the headphone jack of the player and the other end into the Aux jack in the center console.
I think you have to touch the media button on the screen and select "Aux" and you should get audio out.
What format is the audio?? It it one hour per CD or many hours of audio per CD? There is another WAY cheaper idea I've got that I could test on my truck.