VaughnT, I think the way the anvil fits into the stand it would have to be from the same manufacturer as the anvil itself. The cut outs in the base line up with bumpouts on the base of the anvil and there are holes that line up for a bolt to connect the two together. I looked all over the interwrbs before posting here and I couldn't find another like it.
My friend that I bartered with for this and many other items bought it from the widow of a BSW shop foreman, he either bought or took it home when they closed the doors.
I will look tomorrow to see if I can find anymore numbers on this guy. Thanks, Jason