A lot of places carry them: You can find them on Amazon, Knifecenter, and yourcornerstore just to name a few. yourcornerstore has them in a specific catagory but runs out of stock a lot. Another easy way to find them is to go onto the spyderco web site, identify the specific model you want and google it. FYI - there's a big price spread on spyderco's from one web site to another, so always google and compare before settle on a place to purchase from - you can save a lot of money just by doing a google search.
We stock sprint runs and limited editions as they are released, but often times they sell out or get pre-ordered before they hit the market. Keep an eye on our site and forum here as we post regularly with new additions.