You have got the Windows SDK (in my case Windows 7 and .NET Framework 3.5 SP1), and you are looking for Orca, where is that?
Mount the ISO (in my case the x64 version, GRMSDKX_EN_DVD.iso), or explore that with some tool (in my case 7zip x64 9.20, which you will have to use in every chance), drill to Setup\WinSDKTools_amd64\cab1.cab, you will see a WinSDK_Orca_Msi_5E20C107_DAA3_4D49_AFAE_7FB2594F0CDC_amd64 file, extract that, rename it to orca.msi, and that's it.
