Oracle binaries query
The software isn't on edelivery.oracle.com either, as Oracle removed 12.1.0.1 as soon as 12.1.0.2 was released. Almost as if 12.1.0.1 was a stop-gap release.

You'll have to open a support ticket with Oracle, asking for it.

12.1.0.2 was a significant bugfix release, as well as adding lots of new features (JSON storage, rapid home provisioning) - upgrade to it ASAP if you've already got 12c in production.