WANTED: How To Find Tiles, Glass, Beads, Etc.
One of the best places to find these kinds of items to create one-of-a-kind garden items is Freecycle.org. You have to create an account and it's according to the location nearest you. Everything is for free. You can post WANTED or HAVE and since it's local the people arrange to meet somewhere. Especially if the items you want are heavy (as glass and tiles can be) this is much more cost-effective. Great way to share the 500 volunteer marigolds that came up in your lawn, too.