There is no easy coupler kit that I know of. You will have to fabricate a coupler box for a Kadee. It can be done without much of a problem. Since I have plenty of Hornby, Roco, Fleischmann, Rivarossi, and Jouef engines I just took one of my freight cars and have a Kadee on one end and a European coupler on the other. The transition car works good. In a pinch all you need is a simple hook or bent wire at one end for the European hook up.