eBay and Craig's List. Often, you can score NS food on either of these sites from those that quit. The price is usually WAY low. But be careful. That stuff could have been sitting in their basement for 3 years and be expired. So ask the seller to read to you an assortment of the printed dates on the food they are selling. Here is a decoder:
These days, many of the Success food has a Use By date on them that is fairly easy to decipher. The older foods were a little more tricky.
Items that have two letters followed by 5 numbers. The letters represent the plant where it was made. The first 2 numbers are the month, next two numbers are the day and the last number is the year the item was packaged. Each item is supposed to stay fresh 12 to 18 months. This is a packaging date system, not a best by date as listed on some products. For example AB01019, your package was made at plant AB on January 1, 2009.
There is another system of dating using the Julian date. If you have 5 numbers a space and then more number with a semicolon, then the first two numbers are the year, the next three the day of the year, and the last numbers are the military time the food was packaged.
For example if this was your code 07179 18:25, then your product was manufactured on the 179th day of 2007 at 6:25 p.m.