For what it is worth, I have just went through the learning process when it came to finding the correct brake shoes for my '52 Wing. I am not 100% sure but I believe all of the Aeros have 9" x 2" brakes. Anyway, I wrote this up for the cause.
I have been searching Epay and all of the Auto Parts suppliers to find brake shoes for my 1952 Aero with not a lot of luck. I even ordered a set from Summit only to ship them back because they were 11”. My Wing has 9’ X 2”brakes. As I was searching for parts for my AMC Mighty Mite and just by luck, I ran across brake shoes for that. As I am studying the picture, I noticed that they look exactly like the ones on my Aero! Long story short, they are the same and there is plenty of them available due to Army Surplus supplies. The two sets that I just bought of Epay are riveted 9” x 2” with a date on the wrapping paper of 1967. They linings are all 2” wide by the full length.
Part number: 1221/51,
Part number stamped in steel: Bendix 4902
9” x 2” Bonded Brake Shoes fits:
1952, 53 Nash Statesman model 40, Front & Rear
1953, 54, 55 Rambler model 10, 25, 28, Front
1956, 57 Rambler 6 cyl model 5610, 35610, 5710
1952, 53, 54, 55 Willys Passenger car, Front & Rear
1956, 57, 58, 59 Jeep Dispatcher DJ3A, Front & Rear
1953, 54 Hudson Jet, Front & Rear
1951, 52, 53, 54 Henry J, Front & Rear.
M38A1, M170, CJ3B, early CJ5 Willys Jeep
1959, 60, 61, 62 M422 AMC Mighty Mite
And here is where I found a seemingly endless supply for them.
http://www.ebay.com/itm/292035838074?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT