I called up my dealer on Monday to inquire about this and was told a similar story about parts being delayed and that they could not place the order until December 21st - although, the parts manager I spoke with did not mention anything about engineering issues, he attributed it to parts shortages. Then, I received a call today (2 days later) and he stated that he was ale to get the parts ordered and that they will be here in a couple days.
@JeepCares Is there any truth to this that there are engineering issues with the part? I have an appointment for December 8th to have the TSB taken care of. Should I be holding off or should I proceed as planned?