Looks like someone did a bit of necessary creative engineering to fit the Lyman sight blade w/ the front sight base! Ebay is a good start for finding a replacement. Might have to replace the base as well. The copper wire insert is odd. The blade is marked A which is normally something seen with 03-A3 front sight blades. Possibly that would account for the oddity of the pin hole not being a exact match for the base. Sincerely. bruce.
" Unlike most conservatives, libs have no problem exploiting dead children and dancing on their graves."