Try doing a search in google on recycled glass beads. You will come
up with many more options. I saw some at beadsandpieces.com. They
are very pretty. They're the round type (I'm not sure if you are
looking for the type that actually looks like sea glass but with a
hole in it or shapes) but this will start you off in a good
direction. A place called 1worlsarongs.com had some cool pieces also.