After some searching I think I found what you are looking for:
I FOUND THEM!!
Base Ten Magnetic Set
Pearson Education Canada
set of 62, Zippered Bag
Product Code 0-321-18924-8
Grades 1, 2, 3
Pricing: A. $10.50 &pip; B. $10.60
Use these magnetic Base Ten materials to demonstrate a variety of mathematics skills for whole-class or small group lessons
Go to http://www.curriculum.org/occ/resources/R6049.shtml. This link should take you there.
Hope this helps