I messaged Mark this morning via Facebook n got a reply. I told him a couple n here looking to contact him. He said he spoke to Alec from here. Anyways maybe try message him via his Facebook page.
It would be interesting to see how many overlanders need to fill a truck.
Between your pals and a few interested parties here, you may be able negotiate a rate for a bespoke one off trip as a whole. Makes it easier for them.