Hi there

Did you tried Crossdresser,I've used this program in past with great degree of success,but still you will need to make few repairs in ZBrush or any other modeler,but this depends mostly on mesh,I know I converted few A3 clothes to V4 with minor problems or I converted few M4 clothes for V4(I think this has been uniform) which went pretty well too

Here is link on this program

http://www.evilinnocence.com/crossdresser

Hope this helps

Thanks,Jura