Since there are no moving parts in the canister, what needs to be rebuilt? It can be removed, cleaned, dried and possibly re-charged with clean filter medium...but unless something is broken, what is the point?
The vac hoses to and from are important and get dried out, oxidized and fall apart way before the canister needs replacing/cleaning.
Depending on the year of your Jeep are you concerned with the canister itself or the purge solenoid? My 88 or 90 don't have purge solenoids.
You didn't mention the year, model, engine.