So Mopar offers a Cargo Bed Divider for 2019 Ram trucks without Ramboxs. The part number is 82215481. It is basically a Mopar licensed product built by Roll-n-Lock. It is a nicely designed product that requires you to bolt on the supplied rails into the pre-existing bed rails in your Ram truck. One thing you need to watch out for though is that these rails will very likely interfere with the bed rail mounting clamps provided by many of the tonneau covers you also will likely want to mount on your truck. I purchased the Undercover Armor Flex and the three clamps that you use to hold those bed rails on with definitely interfer with the Cargo Bed Divider rails. You can make these work together but you have to be willing to notch out some holes in the rails of the Cargo Bed Divider. If you do this then both of these products will play nice together. Removing some of the materail will not interfer at all with the operation or, at least in my mind, reduce the overal strength of the rails.
As a side note theRam Dealership I work with is exceptional and very Customer oriented. They agreed right away with me that when I ordered my truck and purchased the BUG (ANT Code) that I clearly should have recieved a Cargo Bed Divider and they just handed me one no charge to make good on that option. Ram Cares told me that the BUG (ANT Code) does not show the Cargo Bed Divider as feature currently and they are right, but it did show it when I ordered my truck so they couldn’t help me.