I have a 2007 RX 400h with the 2017 Gen 5 Navigation Map Update DVD U41 Ver 16.1 installed. It works very well but a lot of roads have changed and I would like to bring the map up to date. I have not been able to locate a 2019 map for Gen 5 or newer anywhere. Does anybody know if Lexus stopped producing map updates? Or, alternatively, if there is any alternative GPS that can connect to the Lexus standard display unit. Thanks.