I don't think that would even be possible. There are some items that you might be able to buy parts for (like the HID headlamps), but most is safety stuff with sensors and software and parts that likely aren't practical to add outside the factory. I could be wrong, but I would think that if they did agree to do this, it would be a lot more than $3400 to retrofit. Here's what the package includes:
Equipment Group 401A – Lane-Keeping System, Enhanced Active Park Assist System with Parallel Parking, Park Out Assist, Reverse Perpendicular Parking, and Forward and Side Sensing Systems, front 180-degree camera with washer, HID headlamps with auto high beams, rain-sensing windshield wipers, heated and cooled front seats, and heated rear outboard seats + Technology Package includes voice-activated Navigation System with pinch-to-zoom capability, and integrated SiriusXM Traffic and Travel Link with 5-year subscription; BLIS (Blind Spot Information System) with cross-traffic alert; Remote Start System; auto-dimming driver’s sideview mirror; and 110-volt converter power outlet