What's wrong with running the stock truck mirrors with a twist? My old Georgia farm truck still had the original driver's side mirror and I added the "strange" looking mount to the pass side.
It turned out to be totally worthless until I added the large convex "stick-on" over the original flat mirror surface. The mounting hole reinforcement was already installed under the cowl....just drilled the holes out and now I've got a pass side mirror that is far more useful than the mirrors on any of my late model vehicles. With this mirror added, there is NO blind spot in a 5 window pickup. Makes driving (and backing) that much more enjoyable.
Dave
