The Tailor may be what you're looking for to fit V2 clothes on V3. I've never used it before, so someone else can correct me if I'm wrong and it doesn't do that.

http://www.daz3d.com/shop.php?op=itemdetails&item=677

and the Tailor Update

http://www.daz3d.com/shop.php?op=itemdetails&item=1396