[Source] Jewelry supplies in Philadelphia

I am looking to start making jewelry and I can’t seem to find a
place that carries everything I need.

I want to get some earring studs with the flat plate on the front so
I can glue charms, etc. to them. I am also looking for rings. This
proves to be more difficult. I’m just looking for a basic ring with a
similar flat plate to the earrings.

Meanwhile, does anyone know of a good website/store that sells
shrinking plastic? It is also #6 plastic, the same plastic that a lot
of carry-out salad containers are made from. I’d like to get the real
thing instead of swiping a few containers from the grocery store.

Thanks!