Teardown Lab - GROM BT3 Retrofit Car bluetooth Kit
This really is a nice kit, but actually turned out to be an expensive disappointment to me. Still, that is another story for another day!
Considering this is a technical product the level of technical support is pretty glib, more boiler-room than engineers, so do watch out.
Be warned, although the Chrysler connector looks the same, they re-tasked it in later models for totally different functions, so really check the model guide.
Amazon have these for various models: