Thanks to Rumblon, I have another option on the mirrors. He sent me a pair of NOS stalks that were tagged as 68-72. That covers A and B vans, so it seemed strange. Anyway he sent them to me and here are some pics next to the 66 door. Note that the original 66 had 3 holes, these have 4. No big deal, but the face that sits against the door does have a different curve, more like a B van.