wanted 1960 GMC truck

This is a long shot I am looking for THE 1960 GMC sold by my brother about 12 years ago in Robertsville MO to someone in IL.
It was a green step side, had a 305 V6 big block, and had the name Art Duembler on the side of the truck.
The story My dad gave this truck to my younger brother Brian when he was about 14 years old.
Years later Brian and his wife were in financial problems and she had talked him into sell the truck in 2012 or 2013 (I think).
They have now gotten a divorce and he is putting his life back together, 1 of his biggest regrets is selling that truck.
Our dad passed away from dementia in September of 2022 so that is just adding to the regret.
Unfortunately, that is all the information I have on it.
If there are any records of the sell including the VIN or even pictures, the ex would have them and are not available to him at all.
This may be parked in a barn or fully restored by now I have no idea, but I would love to find this truck for him.
If you could help maybe ask around about it in the Auto circles or whatever it would be greatly appreciated.
Thank you and God Bless