I have the mirrors that are shaped sort of like a tear drop that came on the P1800`s and maybe some of the 120`s. The part numbers are 681682 and 1213604. You are completely right about the blind spot. I almost pulled right into the side of someone the other day. I tried to find some spot mirrors to put on them but all I could find were the large black plastic frame spot mirrors that looked way out of place. I found some old style round spot mirrors that are the aluminum backed low profile at Carquest. I put a large one on the passenger side and a smaller one on the drivers side. No more blind spot and easy to see most especially with the large one on the passenger side. If it were me I would change the passenger side to the largest round spot mirror I could find. Carquest had three different sizes. The largest one that they sold would fit nice on that mirror. The larger the spot the larger the image. I was glad to be able to use those mirrors because I had new glass installed in them. The original round mirrors you have look great too on the 544. Hope this helps. Larry