Where to get the 2020 style bed T-slot?

You guys that bought the T slot nuts for bed rail? t slot bed So the dust has settled here from Christmas and I was able to take a few measurements and pics of the stock tie down system and the t-slots that the ankh protector slot 2 Pcs Roof Rack Cross Bars for Truck Bed, Adjustable Truck Bed Racks Bars Work with Retractable Tonneau Covers Aluminum ·

ts56 slot If you use plain MDF for the table top, another method is to place individual T-slot strips between strips of 34 MDF to create a spoil board