Craig:  In my opinion, you did 'OK'.  That is more than I would pay for one.  The product of Leroy Rice was inexpensive and very practical for Krags used as 50-100 yard 'woods rifles'.  I am sure it worked and was tough enough.  It has the virtue of requiring no permanent alteration or blemish to the rifle.  It did not require great skill to install and stayed put.  However, it is very common, 'Homely', and 'Cheap' looking.  It was intended to be 'locked' into place and was not conducive to fine sight adjustment during a shooting match.  The practical Rice sight did not even get mention in Nick Stroebel's "Old Gunsights & Rifle Scopes", which I think is grossly unfair.  I have never used a Rice sight and find them unappealing compared to the Krag sights of Lyman, Pacific, and Redfield.  But, the products of Leroy Rice, although 'Spartan', deserve recognition as being very popular in the history of the Krag as a sporting arm.

I like it when all parties are happy.  What's a WAG?

Craig:  Thanks for the explanation of WAG;  I like that!
  I'm attaching a photo of a Redfield instruction sheet, as well as, William's gunsight recommendations.  Later Redfield instructions suggested using the 'cut-off shaft' as described by Williams.  You can easily make a replacement shaft out of a large nail, rather than ruin an original Krag part.

Get an original rivet; the Redfield sight just clears when in lowest position.  Send the Rice screw and nut to the gentleman who purchased your sight.
  J. DeChristopher has extractor rivet, (part - k31B), for $10.  (You need to Login to view media files and links)