Thanks for the bump dasvis, I got a VERY reasonable quote from a local sand casting foundry about a mile from me.
All I need to do is come up with at least one. The guy said, to have them made the 3-D printing method would be very expensive, but if he had an original (or one someone already had repro'ed) then he could fix me right up at a very reasonable price.
The sad thing about it is that somewhere somebody has an old Sportsman laying around that needs some brackets too and probably has at least one good one on it.
I don't want to use the word "Please" here, because another Pinsider says I am begging for using the word "please" in my posts/threads.
...and also says Pinside is not the place for me to be looking for antique/vintage pinball parts.