Hope you find the original pair, Luke. Here's what I've learned about that, however: There is a strong spring which holds the blade against the glass at the spot where the arm connects to the shaft (on the cowl). That spring over time rusts and will break. If it is gone, the wiper blade no longer works at all and replacing it will be tricky at best. You'll probably be better advised to buy a pair of replacement arms with new springs. The blade on the 1952 is an 11 inch blade, by the way and an original pair won't have pliable rubber any longer (unless somebody replaced that with new). Good luck.

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end