Ok, answered my own question today. I bought two Fobiks on Amazon for ~$36 (total). These are the Fobiks that also have the air suspension and remote start for my '16 Rebel. I went to my local dealer parts dept yesterday and they gave me my PIN no charge (after verifying ownership with my insurance card). I purchased AlfaOBD today, and used AlfaOBD to program the new Fobiks to the truck.
Under the RF Hub section in AlfaOBD, I used the "Program Ignition Fobiks Baseline System" function to program the keys. It prompts you for your key code PIN (4 digit), then you hit "Start", and insert the new Fobik in the ignition (leave off). I didn't have to turn on the Hazards like some Youtube videos show. AlfaOBD then says complete (or something like that...forgot). I even tried to reprogram a key (thought it didn't take), and AlfaOBD said "key already learned". Cool.