H&A Underhammer peep sight

I recently acquired a old Hopkins & Allen (Numrich) "Off Hand" under hammer .45 muzzleloader in overall very good shape, but having a broken front globe sight and missing the receiver mount peep sight. From what's left of the globe, it looks like a Lyman 17 AML would be a perfect replacement, but I have been unable to locate anything that would be a direct replacement for the missing peep sight.

For those of you unfamiliar with this particular mode, it has a globe front sight, a fixed blade barrel mounted u-notched sight (for the close shots) and the tang mounted (actually the back end of the receiver) peep adjustable (elevation only I believe) for long shots. The peep sight looks somewhat similar to a Lyman #2, but instead of having an angled base, mounts into a single 1/4-28 tapped hole at the rear of the receiver. The hole is tapped vertically (perpendicular to the barrel, not the receiver).

I would like to locate an original peep sight, but after spending hours searching the web, all I have been able to find are a few old posts by people looking for the same thing. If anyone here on THR happens to own one of these, I would greatly appreciate some detailed pictures and or drawings to serve as a starting point for fabricating one.

Thanks, no luck with either of those places.... Numrich does have some H&A underhammer parts, but not the globe front or the rear peep sight for this model.

Thanks Doug.

There are actually a number of currently in production receiver sights (Lyman 57SML and Williams WGRS-WR to name a couple) that will fit the curved H&A receiver, I am hunting for an original H&A "lollipop" peep sight that mounts at the very rear of the receiver in the factory drilled & tapped 1/4-28 hole, which was not present on many of the various models that Numrich produced over the years,