good luck I think it would be easier to swim across bass strait than find a HQ sandman for sale ,the other three models come up for sale though .
If you find one and you need to make sure it is a sandman put the number up and there is some people around here with a great deal of knowledge.
Some vans we need all the info on the van to prove that it is a sandman and even than sometime you have to resort to some of the physical feathers of the van

Some vans can be prove to be a sandman just because of the trim colour and model