The only site I found was for Yasser Moustafa, but he doesn't answer his email's.
http://www.spitfirereptiles.com/sspc.html
That's the only comprehensive site I've found so far but it only gives some general knowledge about southern scrubs.
When I picked her up I was told that the original owner bought this southern scrub from Yasser.
She (nugget), that's what we named her, has eaten once for us. It was an f/t adult mouse. She took the mouse with no problem.
You might want to try an adult mouse if your scrub is as large as mine. What my wife does, she feeds the snakes, is thaw out the f/t mice or rats in hot water. By the time the mouse or rat is thawed the body temperature will be just right and hopefully simulate natural body heat.
A couple of thought's from my wife is not to handle him until after he's eaten. Try a f/t mouse in a separate tank overnight with him and try covering the tank for a more secluded feeling for the scrub.
How are the temps in his tank? Do you know when the last time he ate and what? You may even want to have a vet check for internal parasites.
bob