According to Z_Automotive's website, the Tazer JL Lite does not enable the cargo camera setting and thus is not compatible with their camera kits. You'll need the Tazer JL Mini, which is $330, bringing up the total cost to $510 after you purchase the camera for $180. Pretty expensive for SD resolution.Well, a camera is a camera. The factory sources the cameras from a third party vendor anyway. And the factory 8.4" radio was designed for a second camera, so you would have a "factory" installation with the Z Automotive camera for under $200, plus programming and cost to install if you're not inclined to do it yourself. (I would do it myself. It's not hard - I added a front camera to my JL without the 8.4" radio by adding a separate monitor for the camera on top of the dash. Yours would be much easier since the camera would plug directly into the back of your 8.4" radio, and you could buy the Tazer Lite programmer for $220 and program it yourself. $400 all in, and no dealership involvement, so you'd know the job was done right.)
But, if you'd rather spend $45k for a 2020 in order to have a "factory" camera, that's your prerogative!