If it is Joe's you want they ship all over the continental US:
http://www.joesstonecrab.com/yourdoor/intro.html

Google returns a number of options for stone+crab+shipping , several of which are well known:
http://www.google.com.br/search?aq=f...+crab+shipping

The Florida season just opened on, I think, Oct 15, so supplies should be plentiful now. Usually there are large supplies from Louisiana but there was some sort of problem with petroleum extraction there last year that has probably destroyed the season, thus Florida prices are probably quite high this year.

There is also a huge volume imported from other places like Brazil where they are plentiful, and there are crab farms that help also.

I'm deeply addicted to them, and eat them at least twice a week here in Rio de Janeiro, less often when I'm in Florida.