I found them a the local John Deere dealer . The 4 seals all the same , 2 to the side turned back to back at least that’s what I’ve read they really look large , but they went by the serial number. All 4 was about 24$
Did your drums come off easy? I’m still soaking the splines with P B Blaster , nothing’s budged yet .I found an after market brake kit with the 4 shoes and springs for almost 200.$