All 4 models of Gen 3 eBikes use the King Meter Digital II display, but you can use any King Meter display that uses a 6-Pin connector. Currently only the Digital II has a throttle.

You can purchase the Displays through AliExpress. Please note that these will be shipped from China, so expect long ship times.

https://www.aliexpress.us/item/3256802000299424.html?gatewayAdapt=glo2usa4itemAdapt&_randl_shipto=US

You may need to reset the wheel size information and/or the units on the display after installing the it on the bike.

https://support.fltr.com/staff/kb/articles/169-ebike-functions-and-display-settings

https://support.fltr.com/staff/kb/articles/157-how-do-i-change-my-ebike-distance-display-miles-km

https://support.fltr.com/staff/kb/articles/336-king-meter-display-settings-factory-reset