H'gay buddy,
I've just joined this forum so apologies for the late reply.
If you're still chasing info, I know a little about these units as I own one.
There were three made in total, two with camo and one in plain drab, they were sourced from Bandiana and are definitely prototypes, that's the reason why they are spotless. I know this because I spoke with the guys who made it in the trailer dept personally. Apparently they were made for a specific purpose but were rejected.
They have the same platform as the 1 tonne units but as you know have shocks and ride very smoothly.
Curious? did you have it with the original pintle and if so was it marked with a yellow X? I think one of your blackout lamps were damaged, is this correct?
I guess they are a collectors item, seeing that there are only three of this kind in existence..
I hope this helps.
Cheers,
Dingo