I replaced our failed unit, same location (2010 210P) with this:
https://www.etrailer.com/RV-Stereos/Jensen/JWM60A.html
I know Jensen may not be an audiophile choice but for us, it fit the need and provided all features we had before. It has 3 zone speaker setup, you can use one, two, or all three zones. I got rid of the speaker selection switch and now can play 2 rear speakers, 2 middle speakers and/or two front speakers, plus the subwoofer below the bed. These are all speakers provided in the van, I didn't add anything. Sound is decent.
If you want to find out which speaker is which on the wiring, look up videos on using a small battery to locate speakers.
We're able to play the stereo, CD's, DVD's, and it connects to the TV easily. It will fit into the same cabinet but you need to make a couple of brackets for it. I also have flat rigid foam spacer under it to center it vertically in the opening. It sits left of center in the cabinet.
Its been installed for a couple of years now and has worked well.