In my experience, you can still get your TOR and diploma from USC anytime, depende sa purpose.
If you use your transcript for further studies, usually the exchange is done school to school (transfer of credentials). But if you use your transcript for employment, you can get it anytime.
I have finished my masters also from a different University (diff. country). The transfer of credentials are done usually school to school - I asked the registrar to mail/post the transcripts to another school here. The universities here don't accept a copy of your credentials, they must be mailed from the university where you finished your bachelors degree.
There was a time when I lost the original copy of my TOR (water damage), I have to get an original one from USC, so when I had the chance when I was back in Cebu, I was able to get a fresh copy of my TOR, even though my school records were still from the 1990's. And this was after I graduated from my masters degree.