Sturdy aluminum fridge slide from DFG Offroad. This heavy-duty tray has sliding mechanism for easy access to gear. It is constructed from durable silver aluminum with black carpeted interior surface and integrated tie-down points. Previously bought on Facebook for 80 dollars but was not quite the fit I needed. Reposting here.

Estimated (WxDxH): 18 x 28 x 3 in 
Inside dimensions are 17.5 x 27 in

If you are reading this, then it’s available. I will not respond to inquiries asking, “Is this still available”.  Willing to ship at buyer’s expense.