you may check Rock Auto for wheel cylinders or kits to rebuild them. Is there a local shop that does brake and clutch relining in your area? Here in Seattle we have Brake and Clutch Supply that will reline your old shoes.

For Napa part #s, their UP # will translate to a Raybestos # to plug into Rock Auto. Napa UP129 (wheel cylinder kit) is the same as Raybestos WK129


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof