using kwin in xfce4; how do I get numix window decorations ?

[luctor]

I'm running kwin as a windowmanager in xubuntu. I also installed some qtcurve stuff.

I'd like to use the numix window decorations.
I've installed the numix gtk and kde theme from ppa but I don't see the numix windows decorations in the "More Actions" -> "Window Manager Settings..."