I have maybe 2 or 3 other possible HJ XU3 Kingswood Sandmans, one is an Acacia Ridge assembly so it definitely is.

I have this one recorded from a long time ago as a Sandman. I didn't have the whole chassis number though, could you check the 2nd last 0 is a 0 and not a 9? The info came from Fletch (of who many will know, used to do what Jason does now with stripes).

Funnily enough and the reason I remember it is I own a HJ Kingswood ute with chassis number BHJ1571xM, owned it for years. Was a 350 and TH400 with WB Caprice nose. Got hit in a head on and written off so I wrecked it out, but still own the remains. It is not a Sandman but it was the same colour and trim combination except shows 1413 as the colour as it is Jade Green but with a white roof. Chassis number is very close to yours but has a PSN about 1000 lower than yours (hence why I asked if your chassis number was possibly BHJ1579xJ or BHJ1597xJ or something like that.