Protecting .WSP's with licensing

Hello all,

I have been searching through a number of licensing and software protection 3rd party solutions, and none seem to cover .wsp files. The problem is that these solutions usually cover .exe and .dll's. The web part I had developed is a .wsp that is installed via bat file with a ActiveX client control. Does anyone have any suggestions as to an appropriate way to protect and license my wsp?

Thanks in advance.