I have a 2004 Itasca Horizon 40AD with probably the same dash as you. My camera is working, but I will be following this thread, because it's been a long time since anyone has addressed the need to find an alternative to a stock 7" Sony Camera, which you can not buy any more, except from a wrecking yard maybe?
Are you looking to fix what you have or to upgrade your backup camera to another brand?
Or are you going to make this a "project upgrade" and want to include other functionality like side cameras and even a security system with DVR?
Here's some things you may or may not have considered:
If you look at your bezel you will see that your 7" Sony camera does NOT line up perfectly with your Magnadyne Stereo under it.
This makes going to a double-din system/display very problematic, but no big whoop, because I really don't think you (or should I say I) would NOT want to integrate a GPS with your Camera and Music. Why?
Answer: I have found that having a separate GPS mounted up high, is much more friendly to use, and safer, because the more you are looking down at your dash area the less your eyes are on the road. And you don't want to to be looking at all the detail in a double-din unit while you are trying to drive and RV. Plus "big buttons" are easier to find and push. So Double-Din's are out in my book!
* If my camera were to go out, I would envision a completely different concept, but I admit I have not given it much thought for over 2 years, and I cannot tell you if there are aftermarket camera manufactures selling "Bird's Eye View" cameras, like you can get in cars these days, and I do not know how much these would cost?
* And if I spend any money I would prefer it to be a modern upgrade. So that's why I'm not a fan of the Voyager Display option, but I will mention it below so you can make up your own mind on what to do?
* I envision a large tablet in place of the Sony display, that has more functionality. But tablets are not like LCD monitors in that they typically do not accept HDMI input. So when I hit a brick wall I just stopped brainstorming. ...But maybe you will discover new ideas the rest of us have not thought about, if you are motivated by a dead Sony camera system. (TBD)
=== CAN YOU FIX YOUR SONY? ===
First I'm guessing you need to declare yours Sony unrepairable or not? So to help you with that I have attached a .pdf for you to get a better idea of your camera system, which is a Sony proprietary camera system no one else makes. In addition, I think finding parts is very hard if not impossible.
Second, if might find your video display will start working again if you just remove the wires to the back of the camera and clean the contacts with electrical contact spray.
What is your camera not doing for you?
Is your problem the rear camera or the Sony CRT display?
==> You might call RV Cams (Phone: 225-261-9946) to find out what they say?
RV Cams Kit to Replace Obsolete Sony VCB-MHD1 Monitor