Hello,
you can get it via the SAP Service Marketplace (SMP). Please have a look at these links:
SAP NetWeaver RFC SDK (SAP note 1025361):
-> Download
-> Support Packages and Patches
-> Entry by Application Group
-> Additional Components
-> SAP NW RFC SDK
-> SAP NW RFC SDK 7.10
-> SAP NW RFC SDK 7.10
SAP RFC SDK:
-> Download
-> Support Packages and Patches
-> Entry by Application Group
-> Additional Components
-> SAP RFC SDK UNICODE
Please reward points if helpful.
Regards,
Juergen