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

The overwhelming response was Darifree, a GF/DF milk substitute high in
calcium, vitamin enriched, cholesterol free, and fat free - it is made
from potatoes.  It can be bought at local health food stores or ordered
from GlutenFree Pantry or www.abersold-foods.com.

Another one mentioned Vitamite Milk, which is GF/DF.  Unk if it is in
local health food stores.  It can be ordered direct at 800-443-3930.

Another mentioned she uses  Coffee Rich, found in the freezer section of
grocery.

Another stated Blue Diamond Growers produce an Almond Milk called
"Breeze" which is excellent and your supermarket should be able to order
it for you.

Hope this helps.
Jake