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[QUOTE=wind_magic;531395]either that or maybe it isn't actually butter, the packages seem to say "spread" on them.[QUOTE]
In the US if it says "Spread" it very definitely is not butter. It may be a hydrogenated oil, a margarine or some blend. Some of which may taste just as good but they still aren't butter.
I think you will find that you can buy cases of these single-serving products at a local "restaurant supply" store, if there's none near you ask the restaurant manager where he gets his from, or if you can buy a case from him. Most would be quite willing to accomodate a customer that way, unless the supplies come from a franchise source that can't be resold.
If you look at old cook books, there are ways to preserve butter IIRC by keeping it immersed in oil or vinegar, perhaps brine, just like you'd "put up" a cheese.