I'd recommend getting a good container,bag,backpack-whatever you prefer and putting together your own. It's usually cheaper and better built if you do your own. JMHO
Just reread your post-if your talking about at home supplies-good shelf system and buy what you will need and most importantly what you'll eat(as in your usual food supplies). I have a couple of cases of MRE's,plenty of water,bought some canned supplies from the LDS site,stock up on canned goods when on sale,TP,toiletries,rice,etc. I camp a lot so I keep fuels on hand for lanterns and stoves.Optional heat such as kerosene tower,small propane heaters(Lowes will be clearing out these in the next few weeks at 50%-70% off). The list can go on and on but I'm set for any long term natural or man made disasters. Plus guns and ammo