Yes, there are. Long story short; I was attempting to install PIII's on my Ted, but couldn't get the bushings out. I ended up with a locking set of Kluson's. I don't recall the model number though. I was just looking at their website and couldn't find them They lock from the top of the post. They work fine, and look like the originals. It looks like what they have on the website now all lock with a thumbscrew on the bottom. Actually, I think it was these: http://www.kluson.com/vintage-stamped-steel.html 3 on a side locking - about half way down the page.