Fred
I bought an Xite Solutions Infotainment system XSG3NA 10.4 with a repeater, which interacts with the mainframe 10.4 screen, for my navigator wife. You can view their product on line at Xite Solutions of North America. It uses Rand Macnaly for the navigation and also has radio including Sirius, also bluetooth for Cell phones hands free calling. Basically it does what all new vehicles do. For us it was a great upgrade. You can also call Xite Solutions River Park at 800-442-7717 and to get the best info, talk to the tech people. I don't believe they will sell you a unit but there are coach remodel places that will purchase a unit and install. One such place is Smokey Mountain Coach Works in Sevierville TN, they installed ours.
Keep in mind the Xite Solutions web site is a bit behind on the most current products (in other words latest generation). This is where technical reps come in handy. Their products are in the new Winnebagos and Entegras, and others.
Good Luck Larry D