Mass Production Companies

Hello, I am a jewelery designer in NYC and I am looking to have a
simple white bass metal end cap manufactured in high quantities. It
is bacically a hollow ball with a hole of a certain size in one end.
I have had a mold made and had it cast, but by a small company, and
the per piece rate is just too expenisve because the project that I
am working on donates ALL profits to charity

So I would love to have some on companies who
would/could provide this service…

Thanks!
Hannah
www.azustudio.com
www.relix.com/wearyourmusic