I don't know much about mac-related stuff, but maybe there's a wrapper for vsts to be used? If so, there are loads of plugs available at
KVR: Virtual Instruments, Virtual Effects, VST Plugins, Audio Units (AU) & RTAS Audio Plugin News, Reviews and Community - plus iOS (iPhone and iPad) and Android Audio App News Too.
You can at least go there and check out the search filter options, which will let you single out filters, and for your preferred operating system. Check it out. Basically, any multi-filter will do, as long as it has a notch setting, and preferably with a Q control.
Worst comes to worse, you can use any paragraphic EQ to achieve the same result manually. Waves has a very good bundle for this, along with a ton of other uses and noise reduction stuff.. but it's highly expensive.
But um... I'm sure a clever guy like yourself could find a way to negotiate those monetary terms to your ultimate favor.........