A more affordable option to the ADGU system is this one from Colfax Campers in Denver: Platform Kit - Lexus GX 550Exactly, not both. I'm paying 1k under msrp (no markups) with the military discount they are offering and I locked it in. Just starting to decide how I want to set up a fridge/food/cooking drawer system and storage in the back for camping - some options are quite expensive- open to suggestions.
That is my truck in the pictures. Happy to show it off or answer questions if you are interested. They will also install at their shop if you are local.
I haven't really used it yet, but initial quality looks excellent—no shakes or rattles when driving around town. They use a good quality, lightweight plywood to save on weight. And I worked with them on the cut-outs to ensure access to the power supply and air compressor.
If you are not interested in the sleep platform, I might consider a different system or ask if they can build it at a lower height, since the drawers are pretty large to be level for the sleep platform.