Get samples and buy larger quantities here
Canada
Ceramics Canada (Rockyview , AB)Greenbarn Pottery Supply LTD. (Surrey, B.C)
Lakeview Pottery (Regina, SK)
Plainsman Pottery Supply (Edmonton, AB)
SIAL (Laval, Quebec)
The Pottery Supply House (Oakville, ON)
The Sounding Stone (Winnipeg, MN)
TREE Pottery Supplies Ltd. (Saskatoon, SK)
Tucker's Pottery Supplies, Inc. (Richmond Hill, ON)
USA
Archie Bray Foundation for Ceramic Arts (Helena, MT)Axner Co/Laguna Clay Company (Oviedo, FL)
Big Ceramic Store (Sparks, NV)
ClayMakers (Durham, NC)
Laguna Clay Company (City of Industry, CA)
Laguna Ohio (Byesville, OH)
Mid South Ceramic Supply Co. (Nashville, TN)
New Mexico Clay (Albuquerque, NM)
Seattle Pottery Supply (Seattle, WA)
Studio Sales Pottery (Avon, NY)
Also get samples here
USA
Aardvark Clay & Supplies (Santa Ana, CA)Alpha Fired Arts (Sacramento, CA)
Armadillo Clay and Supplies (Austin, TX)
Bailey Ceramic Supply (Kingston, NY)
Continental Clay (Minneapolis, MN)
Georgies Ceramic & Clay Co. (Portland, OR)
If your local supplier does not have it!
Be sure to request it from them, it is available from their supply chain so they can get it for you.
Alberta Slip is a product of Plainsman Clays and is mined in North America's premier "Clay Country" (near Ravenscrag, Saskatchewan, Canada and also in Montana, USA)