Home Economist in La Grange was my best source...it is sorely missed.
If you don't feel like going out to Westmont, try Wild Oats in Hinsdale
500 E Ogden Ave # A
Hinsdale, IL 60521
(630) 986-8500
That's Ogden just west of 355 (it's where the old Cypress Restaurant was)
They have spices/herbs in bulk in the front of the store by the coffee beans facing the produce side of the store.
If you do decide to hit
The Home Economist
6382 S Cass Ave
Westmont, IL 60559
Phone: (630) 852-0214
across the street on the east side of Cass Ave is
A 1 Indian Grocers
6601 S Cass Ave, Westmont, IL 60559 - Map
(630) 960-4900
where you can find the more exotic.
On the southeast corner of Cass & Chicago Ave - where it's been torn up forever - is a little grocery/produce/fruit market that carries ethnic produce, has a nice deli, great ethnic breads & other ethnic shelf goods.
There's a Hispanic section, Indo-Pak, Asian, Polish/Eastern European, Italian, Greek/Mediterranean sections...also frozen items you don't find everywhere. I don't know the name of it, but it's worth checking out.