I hope I understand your question right, you want to get clothing items for different characters to fit the Genesis figure?
If that is the question then the Genesis Iconic Shapes is what you need.
This here is one of the best things I have purchased from DAZ http://www.daz3d.com/shop/gen-3-iconic-shapes-for-genesis
It adds Victoria 3, Michael 3, Aiko 3, Hiro 3, Stephanie 3 and The Freak to the Genesis figure, not only can you use their clothes you can actually morph Genesis to become each of these figures.
I hope that helps.