Wireless Backup Cameras?

OK, so I have been searching, but thought I would ask the collective. Looking for a wireless backup camera system, with a monitor that replaces the rear view mirror (Chevy Silverado, 2020).
Hoping to find something with long enough range that it will work on the back of our (18’) camping trailer as well, that seems to be hard to find. Hoping to make a mount system so I just have to move it from the back of the camper to the back of my topper when not towing.

Anyone know a thing about this, or have better Google- Fu?
Thanks in advance!

https://www.camerasource.com/

Awesome site. I bought a wired one for my truck camper that is sweet. Plugged right into the ford gear. There are plenty of wireless options too.