I made a replacement pusher for my cat iiq. I bought mine before the maker of the cat changed to silicone. Since I was already working on my retainer I just made some molds for a pusher. It's more comfortable then the plastic pusher that came with the cat. Should fit most push rods tensioning devices. 
 I make one for the CATII and the DTR. 

All my silicone items are made with dragon skin silicone from smooth-on and is certified skinsafe.