opencl sdk 1.5 is missing

I have a quad core 2° generation and i used in the past the intel opencl sdk 1.5.
Now I cannot find again this package, i can find for the 3° and 4° generation of intel cpu but i cannot find the 1.5 sdk.
Can you help me to find this sdk?
or something of compatible with my cpu(core 2 quad) and opencl?
I use vs 2012 c++.