the sad news is there are none, oh there are some in a draw somewhere but to find that draw is very tough
let's, talk about rebuilding
the sight blade is what breaks, and they are not available in most cases and the windage screw retainers are gone also
to take the sight apart, you have to cut the sight blade off and i use a torch to heat a small screwdriver and melt cut it out
so, now you have the windage screw in your way and that damn clip, retainer pick one to remove, good luck with that, you will end up destroying it to get it off
so, i have been there done that, i did find a 3mm retainer that needed to be enlarged, Dremel used that works but you are missing the blade
i am at this time looking at a Ruger pistol rear sight as a replacement and have some 1/2 x 5/8 aluminum bar stock as a perch coming in but the outcome is unknown
could it work maybe but will it look like a drunk cobbed it together unsure
the key would be is it too high and that is untested
the item was on Ebay aand came with the front sights that are handy for us tinkerers
it appears to be a little high but the front sight could be made higher R&D and then failure or success but the 1/2 x 5/8 bar stock is a net-net fit for the filler and or perch
so, my hope was something anyone could do but not done yet