I just did one of my B400s with an EC-135 Fuselage from X-Heli and had great success here's the link to see if you can find what your looking for:
http://www.xheli.com/450fuselage1.html Also keep in mind that any 450 sized fise should work. I found a useful YouTube series were a guy took his E-Sky Belt CP and installed an EC-135 Fuse and it was very useful.
-Jesse </p>