i believe so. most of the freestanding stores i've been just carry the same pigments on <maccosmetics.com>. sometimes, they even run out of a few colors.
at the pro store in soho, they have everything, except discontinued items, of course. i got my platinum, gold, rose gold & copper piggies as well as the clear sky blue & marine ultra for matte piggies out there. if you don't live near one, which is the case when i'm back in hawaii, then perhaps you can look at the colors you want at the macpro website and call the 1-800 number.
hope this helps you!