Using IS and CF for free trial

I am trying to use a 60 day free trail on click funnels with a ongoing subscription for $75 after 60 days.

Does anyone know how to do this with a IS product. I want to use CF because after they purchase the 60 day free trial I can take them immediately to a on click up sell and a one click down sell. The challenge I am having is that CF doesn’t not seem to recognize a IS promotion and in IS you have to have a promotion for a free trial. Any work arounds without having to create another merchant account?

Any thoughts on how to achieve this?