need necklace help!

[ihave-themoon.livejournal.com]

my friend found a picture of a necklace online and wants me to make one similar for her. im sure i can do it, but i need to find the main piece.

has anyone made anything with a piece like this?

any ideas where i could look for the metal ring? i had given half a thought to looking for a small child's or baby's bracelet at a jewelry store.

any ideas or leads would be appreciated!

(posted in a few other places)