I bet you can order them on-line or from a university book store. Even Barnes and Noble will special order for you.
I have the Nursing Diagnosis Handbook
by Judith Wilkinson.
Some schools use the 3 books that go together that are more complete than the Wilkinson,
-Nursing Diagnosis Handbook by Aclkey and Ladwig (for NANDA)
-Iowa Outcomes Project- Nursing Outcomes Classification, editors Johnson, Mass and Moorhead (for NOC)
-Iowa Intervention Project- Nursing Interventions Classification, editors McCloskey and Bulechek (for NIC).
Good luck with your search.