We are currently in development of the WizAffilliates to work with 3.+
It should be ready for testing in a few weeks and we expect it to be ready in 30 days or less if all goes well.
Currently we do not have a plugin for K2Stores. If you can provide us a copy we can review the code and most likely add that to the list.
Thanks again
George
With the WizAffiliate Support Team