Called the "Green Bible" by some, the 1928 thru 1948 Ford Chassis Parts Catalog can be found in CD form and paper copy form. It generally doesn't list superseded part number. Mostly just the last revision of the part used was listed at time of the last original printing in November 1950.
The Model A only used the one made for the model A vehicles. The model B through 1948 all used the same basic part but the last revision of that part was in 1934 with P/N 48-7515. The last use of this part was for the Ford Bonus Built light trucks thru 1952 so there are still plenty of them around.
Clutch arms vary by year. There is a chart with photos on here somewhere.