I need a spyware and benign/non-malicious executables dataset

I am a final yr engineering student and my final yr project is to develop an anti-spyware software using data mining techniques. So i need a dataset containing some spyware executables and benign/non-malicious executables. Because i tried alot to download it frm various sites, bt im nt getting it. And the project deadline is near, so i request u to plz help me in getting this dataset.