Best place to find a man to fuck your wife??

My husband and I are really thinking about making our hot wifing fantasy reality but there is so much we have no clue about.
Where/how is the best way/place to meet somebody to bring into our relationship??
It can truly be anywhere. We had an ex of hers join us the first time. There was the whole comfort thing, and we knew he had a HUGE cock, which was a bonus for us. Or a friend of either of you works as well
 
Also, my wife has told her friend about our lifestyle, and what we're into. So her friends have given her the names/numbers of 3 guys that they had been with personally, because they knew these guys were blessed and fit what we were looking for, and were clean and not weird