I ran into a similar situation of good pricing, but at the loss of this feature. I asked the dealership's service department if this could be added. I was told the Mopar equipment could not be installed by techs at the dealership. I was advised to check out other side companies that might do that. In a *quick* web search, I have only found blind spot solutions and not the cross path detection, plus the blind spot tech was expectedly not well integrated with onboard computer (i.e. does not compute trailer size and operate according to the net length). Again, my web search was in no way exhaustive so there may be something a bit more comparable and integrated out there. Based on RamfanTenn's response, I intend to ask other dealerships to see if their response varies. This would open up options for me.
Tangential question: Do those with this tech find it to be practically indispensable? In other words, are these capabilities so well functioning as to not introduce operational annoyances and instill an earned level of trust in the tech. Stating flatly that without using it for any real period of time, I am assuming it is better to have, than to not have; just trying to gauge practical benefit in case this wait gets too long and I see inventory like this again. I understand it is ultimately a personal choice, but I do appreciate the wisdom of the crowd.