I used the stock flex fuel sensor and fuel lines. Parts are about $150 and took a couple hrs to install. The install requires replacing the fuel line basically from the tank to the rail. You will also need to update the tune to turn on the flex fuel sensor.
Below are the pns for the install on my 2016 6.2 with an 8 spd. The 6 spd trans has a different pn for one of the fuel lines due to how it mounts on the 6 spd trans (23171532 in place of 23171537).
Sensor 13577429
Sensor Clip 20967866
fuel line 23171537
fuel line 23171538
fuel line 20967834
fuel line 23158923