Need more information.
If you are looking at costs do replace brakes, doing it yourself or hiring a shop? Are you considering replacing wheel bearings and seals at the same time (recommended)?
You need to know your axle make, model #s. Look on the axle to get this information.
Etrailer or Eastern Marine (online) should have the parts you need. It is easier and more cost effective to replace the entire brake assemblies with new plates than replacing individual shoes, magnets, etc. Already come assembled just bolt them on.
Steve Rinker
Rochester, NY
2013 Keystone Sydney 340FBH 5th Wheel, 12,280 lbs loaded (scale)
2015.5 GMC Sierra Denali 3500, SRW, Duramax, CC, Payload 3,700 (sticker- not scaled yet)
Take my posts for what they are, opinions based on my own experiences.