I had a set of aftermarket mirrors installed today that I think should be the "cat's meow". (Although my wife may think the stick out quite a ways (17" when retracted & 21" when extended).
My crowning joy was to measure the outer edges of the mirrors and find that I have a 9 foot span, so I should easily be able to see around the 8' 5.5" trailer. No vibration either side.
Not cheap, but I have spent $200 on junk that hangs on the vehicle and gives poor vision, falls off, etc.