If the collision mask is not important and all you need is to split the graphics, you can use a mask object.
Create 2 mask objects (color the unwanted parts in black the rest leave transparent) and set the blending mode to Destination out
On the layer settings where the object is on set:
1. Transparent YES
2. Force own texture YES
Now create 2 instances of your object and the 2 masks and pin them to the object.
If the mask is the same on both sides you can just mirror the same mask.