Originally Posted by Pizza Bob

Nathan:
This thread which is, strangely enough, appearing simultaneously with yours contains the answer...

Help- Rear Sight Questions

I believe that is the rear sight which you seek and the text reveals that to be made by Bomar - I'm sure that Wilson just rebranded it. Unfortunately, Bomar is no more, so your only option is to try and source the sight in the secondary market.

You might see if IHMSA has a house organ and advertise in that. Good luck in your quest.

Adios,

Pizza Bob