This is one of the sets of wave rulers that I have -
Sariditty Wave Rulers I have the set of all 5, but you can get them separate as well. I also have several different Handi-Quilter HQ Wave Rulers (one is mentioned above). Westalee (at Sew Steady) also has wave rulers, called - Spinning Waves. There are also some on the Quilter Rule site:
Spine and Vine Tools -- these I don't have...
yet! And I also have this:
Scallops - Vines - Waves Template