If you install Spybot over the top of the one currently installed,it should replace the missing files:
http://www.safer-networking.org/dl/
If you currently have Spybot 2.1 or 2.2,you could just install Spybot 2.2.
If you have an older Spybot installed,like Spybot 2.0 installed,I'm not exactly sure how installing Spybot 2.2 over it would go,to be safe you might want to try installing Spybot 2.0 over the top of it,which should replace the files,then uninstalling and getting the newer one afterwards:
http://www.oldversion.com/windows/spybot-2-0