Rabers has one for $70. Mine is nothing more than a large 'C' clamp with a forked top end to rest on the retainer. It would be really easy to make one from a large clamp with a 2-3 inch length of tube welded on the top and then enough (most) of the tube cut away to allow access to the clips. Of course after you bought the large clamp, the tubing, welding rod, you may have $70 in it!