I have Draw Tite, in channel visors. They work well. Usually open the windows only on city streets. I keep them closed on the highways and so far have not had a problem.
Do a search on ebay or a google search. I think I paid around $55.00 for the four of them.
One precaution. Do a trial fit before removing the tape cover. I did a little work on the edges of the two back ones to get them to fit better.