3D Model Help

Recently i’ve started using a manga creation program called Comipo and i’m using it to create a comic book. However Comipo is very limited in the types of 3D models it has so i want to make my own so i found someone DA who has experience in making models in MMD, but she needs the original Comipo models. But the problem is all the models are in XML format i need a way to convert them to .OBJ but i can’t seem to find it anywhere. Any help would be appreciated.