Thanks FredC

I actually was looking at the Springfield front sight approach as the simplest solution, or possibly one of the reproductions soldered on if I could mill the bottom to match the curvature of the barrel.

I do have access to a mill - sort of.  It's at work in an open shop, but the (very very large high tech) company has a "no guns on site" rule.  I could definitely take in a site base and do a little work on it and not cross that line, but taking in a barrel I'm not sure about. 

It's crossed my mind just to mill up my own replacement site base like the one attached to this post, and as mentioned, solder it on.  I just would need the dimensions of one.  Or yea, just buy a replacement - they aren't that much in a way.

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