those kind of supplies you needed sound like they can be at these stores listed below:

# Aaron's Brothers
# Michael's Crafts - (beware, not a lot of things you need available in ALL of this store)
# JoAnn's Fabrics

I only give you three stores because they are easy to find and looks like you're in a hurry? classes won't wait for us! I still gotta find RC sheets & negative sleeves for my photography