I am a open billiards market member on FB. There are lots of cues listed there. I recently wanted to buy a titlesist conversion, and searched all of FB for just that "titleist conversion cue" I found one, in a different FB group, which I subsequently purchased. I have not joined this other group. I dont even remember exactly what the name is, I could go back and find out if need be.
I am interested in the right way to do this, as i am not sure the way I did it is the best, only one way thqat worked for me.