Best bet IMHO is to buy your ammo, cans, bandos, etc seperate and assemble your SHTF collection yourself. Hours of fun for the whole family. If you read the other posts on here, loading stripper clips can even be an educational expeirence for children!!!!!!
In all seriousness (I was actually being serious about the above also), I haven't seen a complete deal like you are looking for in a long time.
I really think you would be best served by picking up a case (or two) of Lake City M193 or Winchester Q3131A and loading your battle packs yourself.
There is a lot of good information about where to get bandos (Wu's like Troy mentioned), grab the ammo cans locally if you can, load the clips yourself, and if you have trouble packing the ammo cans with the loaded bandos, well, don't despair, there is even info on here about how to pack the cans to get max rounds per can.