Had some folding legs that were ear marked for the camper kitchen, but due to slackness didn't make it there... and anyway, they'd have been too tall.
Big Green Shed had 1800x1200x17mm structural form ply for $50 a sheet... packet of $4 screws and nuts later, and I now have a very functional work table.
The next plan is (another sheet of $50 form ply) to do a false floor for the 4Runner, and then using the following bits and pieces:
The idea being, that I can move the eyes around the 20 or so holes I'll have in the form ply floor as we change how things are loaded (mainly with and without mountain/road bikes as they travel inside the car) allowing us to keep things organised and stable in the back.
The threaded nuts will be pulled through the ply, having been drilled in from the underside, and the screw the eyes into the top (with an allen key on the other side to stop them undoing.
Sorry for jumbo pictures, BGS won't let me make them smaller...