Where can I find supplies in the USA?

Most supplies can be ordered online from our various Shroomery Sponsors.
We ask that you make an effort to search their inventories before ordering from a non-affiliated store, as they are integral in keeping this community alive! If you've exhausted their resources and still need to find other basic products, try the following links (but realize you won't be supporting the database that has given you so much awesome knowledge ;)

Vermiculite, perlite and coco coir are available in garden centers and also in stores that carry hydroponics supplies

Vermiculite:
http://froogle.google.com/froogle?q=vermiculite

Brown rice flour is available in health food stores.
http://froogle.google.com/froogle?q=brown rice flour

Wide mouth 1/2 pint jars
www.kitchenkrafts.com

Perlite:
http://froogle.google.com/froogle?q=perlite

LECA (Hydroton / Geolite)
http://froogle.google.com/froogle?q=geolite OR hydroton OR HydroKorrels

Coco coir:
http://froogle.google.com/froogle?q="grow brick" OR "coir brick" OR "gro brick" OR "cocopeat"

Limestone flour
http://www.google.com/search?&q=limestone flour horse