<<Disclaimer: Verify this information before applying it to your situation.>>

There are two shopping guides available:
1. TCCSSG - published every Fall
To order send a check for $10 to:
TCCSSG Shopping Guide
34638 Beechwood
Farmington Hills, MI 48335

2. Gluten Free Shopping Guide
To order send a check for $8 to:
CSA/USA
PO Box 31700
Omaha, NE 68131

The reviews I received (~8):
Most people recommended getting both guides, because there is overlap
but sometimes particular items can be found in one or the other. A few
people cautioned to never solely rely on these guides, since products
can change, therefore: always read labels etc.
A few other comments:
"TCCSSG tends to be more recent, b/c it is updated yearly vs CSA only
once every 3 years."
"CSA has more brands from other parts of the country that TCCSSG may not
cover." (TCCSSG is based in Michigan)
"CSA is more national in scope"
"CSA offers general discussion of each food category before it lists
items in it, and clarifies some confusing ingredients you may find."