Heres a build thread of my rear drawers that me and my brother made a few months back
They are made from 12mm marine ply,
I covered them with automotive balck carpet from bunnings (the same stuff that all the other interior carpet is done with) and some aluminum edging to give it a nice finish
I also put down a rubber mat to minimise rub between wood and tub.
I sealed all the wood with some shite that dad had in the garage, he's a painter so we had plenty of good stuff to do the job
Heres the base and the gables
I added on a little centre console for extra cab storage space
here's with the drawers in, (i ran out of the darker stain on the drawers, hence why they are darker then framework)
and finally with the top on, added the aluminium trim on for a better finish
i used gate latches and padlocks for extra security, they're not the best option but they'll do for now untill i decide to improve them. I also cut out hatches above the wheel arches to utilise extra storage space in there and some tie down hooks to secure everything down.
I hope this helps anyone whose considerung making there own rear drawers
Joe
Its good to have things stored away without banging/rolling around in the back 
