Could this be a HZ Sandman?

[Innuendo]

The only reason I asked was, I found that glove box on fleabay, had the right part number, seemed the right colour and I thought, hey IF the van is an XU3, kill two birds, that is all.

I'd say this is the right placard for your Van assuming it is an XU3 Sandman. Also be aware that it is also correct for a 14.5cwt WB. So the lid may in fact be from a WB.