I bought a cheap backup camera monitor. I was replacing a broken one mounted on top of the dash, but it came with an in-dash mount. If you measure the old monitor and clearance around, you can buy one close in size and trim the hole with a dremel. The replacements sold for the sony display have the same mount. Amaz prime day has a 7" for $37. You can mount a 7" or 9" vertically or horizontally to best fit the space. On the Amaz item, it has a picture of the mount.
1996 Holiday Ramber traded in
2005 GeorgieBoy Pursuit 3500
2003 Monaco Signature Commander 45