SQL SERVER 2008 SP4
http://download.microsoft.com/download/a/a/f/aafadfb7-885d-40d6-ad1c-40b63cedaa84/chs/sqlserver2008sp4-kb2979596-x64-chs.exe
SQL SERVER 2008R2 SP3
https://download.microsoft.com/download/9/6/4/964BB4EC-FC28-4DA7-9295-7D4A8FDBE1A4/CHS/SQLServer2008R2SP3-KB2979597-x64-CHS.exe
SQL SERVER 2012 SP3
https://download.microsoft.com/download/1/1/D/11D3D774-B6E3-4762-BFAC-BDF263C2BA75/CHS/x64/SQLServer2012SP3-KB3072779-x64-CHS.exe
SQL SERVER 2014 SP2
https://download.microsoft.com/download/E/F/3/EF3834C6-CCDE-4A86-8C35-748114FEF42D/SQLServer2014SP2-KB3171021-x64-CHS.exe
SQL SERVER 2016 SP1
https://download.microsoft.com/download/4/B/F/4BF7402D-0366-4C7B-9E8F-B045E4DC049F/CHS/SQLServer2016SP1-KB3182545-x64-CHS.exe