You might hit the Ram truck forums and see if anyone close to you has the AlfaOBD app and a gateway bypass. It may even be the cheapest way for you if you were to purchase the app and bypass. Together, you are looking at about $100 and they can do so much more than just program your fob. Lots of threads on this on the Ram forums and lots of videos on Youtube. I have it and it is cool!

Introduction: www.youtube.com/watch?v=YreBRFZ7FsU&t=415s
Programming fob: www.youtube.com/watch?v=TdeUN3YmSNs

And by the way, AlfaOBD works on most late model Mopar family vehicles and can unlock many extra features that were options on your truck but not initially activated. Again, really cool. Check it out!