Mine is likely similar. I measured the opening then bought a TV to fit the opening. I got it home and found that I needed to re-locate the bracket down (4 wood screws) then needed to notch the bracket because the bracket covered the antenna in cable. I got a Phillips model 19PFL350D which is a 19" TV. I was going for inexpensive, so I'd bet that you could fit a 22" in there if you try.
When shopping, you may want to bring the bracket with you to check and be sure that it won't block any necessary ports.
The 365 BHS has a mount located in a cabinet door. When I measured mine, it looks like you can squeeze a 24" in there, but, I too am thinking a 22". However, my 47" LG fits like a glove on the shelf opposite the bed (it blocks the window though).
2015 Seismic 4212 on order
2010.5 Dodge Ram 3500 MC CTD HD Dually (4.10 gears), Firestone Air-Bags, with a Superglide model 4400.
2012 Yamaha Zuma 125
It holds a 22" nicely for me. Dynex is what I bought from the local electronics store on sale at the time. DVD's do not fit in the holes on the sides so you will have to change the brackets if you want that option. I just use the kids portable car one if we want to watch one.
2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's