These are very nice sights.

Some 20 +/- years ago, there was a write-up in Rifle (I believe) about the Lyman 36 and there was a gun shop that was reproducing them. By the time I was able to contact them, they had sold the few they made and were not reproducing them.

It seems like a shop with CAD controlled mills and lathes could produce these but they may not be enough of a demand.