For Eileen Fisher, I prefer to shop at Nordstrom for selection and customer service. But it's worth it to check out http://www.naturals-inc.com/ they don't carry the entire line, but have the core items like those fab pants that should belong to you. They regularly offer 20% discounts! I see an add right here for the site with a code. And if you sign up for their emails, you'll start to see a regular rotation of 20, 25, and 30% offers. They don't charge sales tax but do charge for shipping.
Also, as Joy noted the EF website has a sale section. Sign up for email and you'll get notices of additional discounts. Free shipping to store if that's convenient for you.
Lastly, look at the EF website for store location to see if one of her few outlets is in range for you. Worth a try!