Well- the symbol sets were available through ESRI's site as recently as 6 months - 1 year ago (I had to track down the Oregon shields). I cannot find them now, even through Melita's link. I was able to track down a copy of the California shields on another website. You can find it here.
ESRI- please stop monkeying around with your websites. This what happens. Less documentation, less downloads, but, hey- we now have a flat, modern looking design!