Call Editor Window script from Popup Window Content

What I'd like to do is call a function from an EditorWindow on a Popup Window. I've followed the popup window documentation and have something pretty identical, except I have text fields where the toggles are, and a button on my popup window. What I'd like to do is send the strings in my text fields to a function on the first script via an onclick of a button. But since this is an editor window and not a game object using getcomponent I'm not sure how to get the two scripts to talk to each other.

Thanks for the help in advanced!

 

Did you fix this eventually?

 

I did not, I ended up moving onto something else and never got back to it. If you do get this to work, please share as I'm still interested.