Why would you? I just bought both rears for my 8 1/4 rear from Rock Auto. Raybestos brand new for $ 5.62 ea. Some things are worth rebuilding and some aren't.
I would rather trust my brakes to rebuilt boni fide Chrysler wheel cylinders as compared to questionable chinkesium from overseas. Just my personal preference.
Oh and why would I? Because I am a mechanic and I actually enjoy fixing things like new again instead of giving up and just replacing it. It's all about the sense of accomplishment.
