The ones I use are called AMP 'female disconnects' a the home depot and come in 10 packs. The brand is TYCO... but I am sure there are others. upc is 4568604511 if that helps.
be advised that they all may not use the same size. A celestion might use a bigger clip than a jensen tornado. etc.. But none of the clips are expensive, and easy to grab a few different sizes.
I still like soldered in,instead of clips.. I've seen some clips come loose,or someone use the wrong size,and the clip vibrate loose on the terminal,making it sound like a blown speaker,or buzzzzzing..