I found this, $50 cheaper, and don't have to wait...you can down load it. Seller has 100% positive feedback.
I used to use ebay alot 10-15 years ago, back then, the feedbacks were accurate and they'd boot any bad apples quick.
2018 USA North America NAVIGATION MAP UPDATE UCONNECT 8.4A 8.4AN JEEP CHRYSLER | eBay
(from seller)
1. I will send you link to software.
2. Pin Code will be provided based on the code request from the screen after inserting USB.
3. Code will be provided on the same day (unless it's middle of the night in UK).
4. Code request does not change, so you don't have to sit and wait in the car.
5. Provided software is part number you're asking about (please see pictures in the listing).
Please see below for direct link.
Once downloaded, please unpack it using winrar and copy the content from folder to the 8gb USB drive, formatted as FAT32.
Please make sure to use Windows machine as MAC seems to not work on this.
Please also make sure software update is done (if required).
All instructions in the listing.