FALLS & HANNA still have an office in Enniskillen.
The most likely place for their old documents to be stored is in PRONI Belfast under
Try a Google search.
You could write and ask them where the particular papers are archived
FALLS & HANNA, SOLICITORS
should get them.
If that does not work email me off list with the details you have and I may be able to
suggest a different approach, or phone and ask them for you.