Yes, the 2016 with the CVT has the cooler filter.
I have never seen a Chrysler part number for the filter, but they're not hard to come by after-market.
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From the online Chrysler parts sources I have, I've only seen the o-ring shown as part of the oil-to-water cooler assembly.
Some get them from ebay:
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And $500-$600 is a bit steep, you might want to shop around a little.
If you think you might want to tackle it yourself, here's a post with pretty much all the info.
Been done to death but I cant find all info with links etc to know i'm on right track. Want to service the CVT (replace filters and fluid) also have seen this 4 ports CVT Transmission Oil Cooler, 2 for Engine Coolant 2 for CVT Fluid. 2 pipes for the inlet/outlet of coolant 2 pipes for the...
www.jeeppatriot.com