Ditto on ATC Prep, best $450 I've ever spent, Also get an extra hour or two with Maria (ATC's owner)?? for one on one interview prep, she helps with answer techniques and has a great non-pilot, HR perspective....more $ well spent....
If you want full motion sim time in Seattle, the only option is in the 737 Sim at Flight Safety Boeing ($550/hour).
For MD-80 Full Motion (which is what most of the AK interview sims are in), I believe Long Beach, Flight Safety Boeing, is closest, same price ($550/hr). Good Luck