Last week I was browsing the WWE13 CAS save and found that it contained JBOY files, so as a test I extracted a model from the save and reversed the header to read YOBJ and injected it into the Rocks model and got the below image, not pretty but it was a start.
I knew from this point that I was on to something, if the CAW model loads then the CAW items should work as well.
Tekken kindly tested the CAW items and as you can see from his thread it worked
Although this is a breakthroug