Yes, Clayton does not make one for the 4 cylinder. I talked to Adam from Clayton at the Great American Jeep Rally in CT and he said they don't get enough requests for the 4 cylinder to make one. I'll post pictures when its fully welded but I've made L brackets to weld to my motor mounts to attach the clayton engine skid cross member to and will drill new counter sunk holes in the skid.
I was going to make brackets off the frame in the 6 cyl location but the cross member sits too high for that to work without modifying the size of the clayton crossmember. I don't weld myself so that was too much for me.