At this time, it is not possible to export the list of missing originals resulting from the “Find Other” menu option.
However, that is clearly a desirable feature, and I will make sure that the product team is aware of it.
The list of duplicates resulting from the “Find Other” menu option, is displayed in a view labeled “Find Results”, which can be copied to a gallery.
Depending on the circumstances that lead to duplicate records and missing originals, it’s likely Priority Technical Support can help you. I will follow up with you directly to arrange your preferred method of contact. Thanks!