You might find that a wide track Sankey suits your purpose better, it has a bigger tub and tailgate. the wheel track is made to match a 110 the old sankey you have there is an old narrow track for series vehicles.
The wheel bearings, springs etc were all standard landrover parts for interchangeability
Great trailers I have one too.
PS the last of them, were wide track and wolf spec with hydraulic disc brakes.
PPS the reason the military scrapped them all is that they were not legal in europe as they had no break away cable so if you take yours abroad you need to rig up a brake away cable, in case you get stopped. You also need to add a chassis plate for some countries as not all the european required data is on the military plate.