My HZ ute has the same door handles too but I have never seen a Sandman with them.
The fact it has GTS guards means it's been "customised" so along with the new paintjob it's a possibility that the blackouts were left off, the windscreen trim changed to polished stainless, & door handles were changed and so they matched the polished trim. None of that is beyond the realms of possibility.
Otherwise it has a Sandman "feel" about it (GVM notwithstanding) and is definitely worth a HHS report.

Cool van regardless... I hope it's a Sandman.