Ended up making our own storage unit, took a while to research what was out there concluded we could not justify to purchase one of the off the shelf units and no one made one how we wanted it to fit anyway.
Some rough measurements for those interested – base 960w x 810d, height of the board at the back is 335mm the size of the ORS frame (size below) dictates the dimensions around the draw. Height of the centre board is 555mm.
After doing all the leg work we opted to use the ORS fridge slide (385 x 725) and one of their single draw frames (455 x 780 x 280). With this size draw we are now not able to fit the jack into its normal location but with access to the storage under the fridge slide we store the jack there. To get full access to the jack compartment we would have had to gone to a lot smaller draw and would have been a waste but can still put other items and carry the wheel brace and jack handle in the normal location.
Also helped having a good mate that had just finished making a set from scratch for his 100 series and seeing what did work and what was a real pain to get right so hence the DIY frame and draw.
Our setup allows the carpet to be left in and is held down at the rear by two bolts coming up from the jack compartment with spacers to get the right height and two straps at the front using the original tie down points.
Used 12mm ply glued and screwed then auto carpet from Bunnings over the top. Once you have made one you can appreciate why you pay a lot for the off the shelf units.
Mounted ARB air compressor on the right hand side at the rear and it fits in very nicely but do have to unbolt it before removing the unit.
Weight wise it is not too bad as I can handle it by myself to get it in and out.