Do you mean a cooked steak from a restaurant? Or do you want raw/frozen to cook yourself? If you want to cook it yourself, go to the Farmers Markets (University District, Ballard, or West Seattle) and go to Skagit River Ranch, Sea Breeze Farms, or Olsen Farms.
If you want it in a restaurant, Thundering Hooves and Skagit River Ranch supply several different restaurants in the area.
Here is the info for Thundering Hooves. http://www.thunderinghooves.net/where/restaurants.htm
Here is the info for Skagit: http://www.skagitriverranch.com/pages...