It was made by RCA. It had a VCD, DC and FM radio. Your TV would play through the speakers. I removed mine when I install LCD RV's as it did not accommodate HDMI. I currently use the in-ceiling radio speakers. But would rather use the other speakers just haven't had time to figure it out. This is what I use for the radio speakers.
https://www.amazon.com/dp/B004NEUK86?psc=1&ref=ppx_yo2ov_dt_b_product_details
https://www.amazon.com/dp/B0873Y5MQ5?psc=1&ref=ppx_yo2ov_dt_b_product_details
I have a 2005 Diplomat which sounds like I had the same system you did.
