Absolutely nothing crummy about Pedersoli Sharps....of which both of them are...great shooters, amazing fit and finish...There ARE some crappy reproductions out there (as Mr. Jerry can attest after rebuilding a lock from one) but Pedersoli ain't one...
I can imagine that it would take some serious reverse engineering....however...I'm left-handed and can run them without a problem....
I have operated them in passing on a couple of occasions and could make it work. It's just maddening having to reach across for the hammer on an action that wide and I can't bring myself to get a custom build on a design that isn't exactly perfect for me. I went so far as to ask Shiloh if they could/would and got the big negative on it. Like you said, it's probably just too much cost and work for a minimal market.
problem solved Sako
I had an original 1878 Sharps Borschardt in .45-70 some years back.