i dunno if a 4 runner console will fit or not,maybe if anyone who reads this has a runner with stock console can measure and let me know please.as fo rthe back i think a lockable box of some kind will be sweet,i will prob build the box,my best friend builds all his own for the flatbeds he builds there top quality boxes.im almost thinking i might try to recess it into the floor somehow.as for the back wall i was looking earlier and i think a simple plate of smooth will work fine,just use rubber spacers with small bolts to mount it evenly and for rattling lol.then i can weld or bolt any kinda brackets i need,sound like it might work??