I have the same revolver, also have the same broken pin. Would be good if a Uberti will fit, I was thinking of welding a piece of rod with a proper looking end on it.
I recall checking in to Uberti Rem. guns, on the parts list something was different. Maybe the rod dia.? Maybe can use part of the Uberti to extend the original? Can't recall.
Keep us posted on your Quest.