Worm samples /exploits

I am trying out a new IPS solution and would like to get some samples of older exploits/worms which can be used to check the credibility of the solution. There are number of tools out there which simulate them I believe ,yet it would be good to see if we can get a real sample which can be run on a virtual machine and see how it impacts and then put the IPS solution in place and see what it can block. I would appreciate if anybody could point me to the right resources/website from where I could download these.


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