You can use
https://edelivery.oracle.com--
https://edelivery.oracle.com/osdc/faces/SoftwareDeliverySearch for "Oracle Financials"
Then all the EBS-related downloadable software package will appear.
EBS 12.1.1 is also listed there when you choose the Oracle Financials. (Oracle E-Business Suite 12.1.1.0.0)
There is no version named 12.1.0.
And as for 12.0.*, you need to request it from Oracle Support.
You need to open a :Non-technical SR and then choose the issue type as Download issues.