As far as I know Stanley Robert's is still alive and kicking, but I don't think Stanley is still running his school anymore (but did sell a franchise to his schools). I tried to contact Stanley a couple years ago but had not luck getting in contact with him. I'm still trying to determine if there was ever a $2.50 chip.

Here's the link the the other chips.

http://www.themogh.org/cg_chip2.php?id=NVLV29