Visual studio 2010 missing BI 2010 (SSDT 2010) Where can I find a link to install SSIS 2010 ( SSDT 2010 or Business Intelligence 2010)

I have VS 2010 on my machine.
Visual Studio 2010 is no longer supported for SQL Server Business Intelligence tools. You will not find a download link unless Google or some other site might have cached it somewhere.

You will need to download Visual Studio 2012 SSDT-BI or 2013, these support BI projects for SQL Server 2012 and 2014 respectively.