fj 62 side mirrors

Looking for the piece that fits under the side mirror for my 62. See picture.

I have a set of Toyota OEM Euro/Aussie Style Side Mirrors for an FJ60/62. They are in nearly new condition with good gaskets. $250 plus shipping at whatever it cost UPS Ground. Shipping from 22901 and box is 13" x 13" x 8" 4 lbs. Below is link to a bunch of photos of the mirrors. Thanks...