Thanks Aleksandar.
you're absolutely right, I found everything in PartnerSource.
Public info
"SQL Server 2012 Runtime software will be delivered electronically via a download in PartnerSource and will not be available as physical media.
The software may not be distributed to customers and must be deployed by the partner. Partners are responsible for complying with the terms of the program.
Partners must provide customers with a printed copy of the SQL Server 2012 Runtime Software License Terms (“SLT”) included in the download folder and ensure that the customer"