There are a number of different Xite systems with different functions and different screen sizes so it's impossible to know what you have and what would work. There are a lot of folks on IRV2.com in the Newmar and Entegra forums with Xite systems and some of them have replaced the entire system.
There is no one "here's the thing to use" answer. Just different choices with different connections and features.
In other words, there is not an easy solution.
Riverpark Inc sells an entirely new models with new monitors etc. I'm not sure that it has CarPlay/Android Auto built in either. The cost for a new system is $1,500+.