A hinged, lift-up drawer system has been done by a guy on the Sunshine Coast hinterland. Can't remember the trade name, but if you do a search you should find the posts.
I dropped in to take a look and it looked like a good system. The main worry was the load on the gas struts which could result in them not working over time. The other worry was the weight of the system.
The design was quite cunning as it had a set of verticals at the back of the rear seats as part of a steel frame. The hinges were at the top of the verticals so the false floor lifted higher to allow access to the tyre.
I gave up on drawer systems because of the weight. I use a new false floor with fridge slide - which holds the fridge and the second battery - on the passenger's side and plastic crates on the other side. I use straps to hold the crates down, anchored to the child restraints on one end and to tie downs attached to the false floor at the other end. The false floor is attached to the spare wheel attachment bolt, which I have welded a loop to, via a ratchet strap. I carry a second spare on the roof.
If you don't put the spare on a carrier or the roof, you are going to have to be very creative...
Cheers
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