Well.......if it will aid in your research project, I have paid for two sets and I ain't seen either in years..........praise The Lord!
My third wife wanted to get a set, but I told her I could only afford one side right now, but I could pay for the other in a couple of months......you know like truck tires......... fronts now and rears in a month or so.........she gave up the idea.
I now have a wife with a perfect natural set and I am too old to give a chit!
Ain't life a giggle?
"Being an idiot is NOT an art form. Give it up!"