I've a clip from Essential Gear Dy-507-s (a relatively unknown AAA aspheric light) that seems to fit.
If I were to install, I'll probably wrap the tail with a strip of thin acetate, insert the clip and slowly pull out the acetate. Just a theory.
I, on the other hand, like to use AAA edc with TEC P7 suspension clip. It's discreet and easy to attach. Also, clips that hang onto lights based on tension isn't secure enough for me.