First decide what features you want and can afford, then look online on EBay or Amazon or AliExpress for a 2-DIN 7-inch (or 6.5-inch) System to slide into your stock housing, using an aftermarket Metra frame and harness adaptor and mounts. Search here on this site and online for installation tips and tools used in removing the dash panels and the stock radio. Newer versions now come with plug and play adapters, including wireless, internet-ready 3G, Android or Windows systems, like tablets or a PC. And if you want one with USA TV, make sure you order with an ATSC digital converter for USA.
You can also choose to keep your existing radio, replacing your clock and flasher panel with a curved hood peeking up over the dash, where you can then install a 7-in unit with GPS, camera and touch screen, thereby keeping your stock radio in place.
Hi.. found this webpage for KR Depot on another related Korean website.Navi-1.co.kr . Be sure to open it in Google Chrome with English Translate enabled, for more understandable steps, pictures and pages. They do use the strange word "Roche" to describe this unit, as well as "landfill" for the location and "trip" for the dash trim pieces, but they very clearly show the wiring hookups needed for installation in close-up pictures . Good luck .
Did find this company -JY Customs (Beat Sonic) actively selling their version of the GPS bezel, JR Customs in USA, but apparently it only will accommodate a 7 in. Magellan Roadmate (with a backup camera) but not big enough for a 2-DIN system. Try to contact them.