Need solvent, blast media & pressure regulator

Not sure about your area, but solvent is still available here. I have seen it recently at auto parts stors in cans, (I think 1 gal) I know its not cheep. Where does that solvent go in that? I'm used to the ones that sit on a drum of it. The bigger problem is what to do with used solvent. I have 2 maint shops at work, one that is used frequently still uses Safety Kleen solvent and they service it. One in another building does not get used as much, is Zep water based with a filter. The guys just change filter and add fluid as it evaporates.