After market tow mirrors

I had a problem with the CIPA strap on mirrors staying on my passenger side. I have an Expedition with the turn signal below the mirror (an thus no slip on ones were available to fit that mirror). I tried everything I could think of, from the CIPA, to the suction cup ones. The Aero were the only ones that would stay since they clamp onto the mirror frame. The Aero mirrors are rock steady too. All of the other ones I use vibrated very bad. So much so that I was ready to give up having a mirror on the passenger side since I couldn't see anything anyways. I LOVE using the Aero mirrors. I've only had them a year, but I wished I had started out with them. I thought I could get by cheaper. It was definitely worth the expense to get the Aero.