No such thing as a HBD Commodore Panel Van. The Ute's they are made from are simply called Holden and never been badged a Commodore or plated that way.
While I understand they look the same/similar to the Commodore and even share parts. It's like calling a Monaro a Kingswood or V2 Monaro a Commodore.
HBD did heaps of options to purchasers requirements and each option has a code that gets stamped on the HBD plate. The canopy option for instance is CAN.
In a similar way to XX7 or XU3 it is a definitive way to know if it is a factory Sandman option.