Chilla T

I'd like to purchase an Android Auto head unit, maybe something like a Joying, for a 1999 Lexus LX470, that has 2 camera inputs. A reverse camera which switches on when the car is in reverse, but also a 2nd camera on a caravan, which can be viewed when reversing with the caravan on. Is there a model which fits well in the 1999 Lx470 and has multiple camera inputs? Thanks all.