They are available individually for either big or small block. right from Mopar Performance dealers or distributors like Jeggs and Summit.
PS: better learn how to adjust rockers. Brute force isn't one of the requirements. In fact I don't see how tightening a rocker can pull the threads unless you were adjusting on an open valve with the piston at the colliding area and you adjusted to the collision or coil binding and kept tightening.