I found a replacement entertainment unit , the original drive unit is $560 to replace. I have installed a Jensen and it works well. Fits in wall mount hole with very little modifications.
Jensen JWM62A AM|FM|DVD|CD|USB|AUX|App Ready Bluetooth Wallmount Stereo w/ App Control, 3-Speaker Zones / 8 Speaker Output 8X 6 Watt, Receives Bluetooth Audio (A2DP) & Controls (AVRCP) from Devices
2015 FunFinder 210uds, 2014 Silverado LTZ-Z71 Regular Cab Short Box, 5.3l with towing package