I looked and looked at Michael's a couple of years ago, couldn't find it, clerk couldn't find it, gave up. Someone on this wonderful quilting board said to use the tip end of a mechanical pencil. Happened to have a nice cheap plastic one, took it apart, took apart the glue bottle tip, inserted the pencil tip and Viola! A nice thin line applicator tip. I do notice that I have to rinse it out after using, but I bet you'd have to do that with a metal tip, too. By the way, to close it I use a straight pin. DON'T use a regular straight pin. They rust. Use a brass one and just stick it in the tip of the tip. When I empty a glue bottle next, I'll just save the original top and switch out the tops, washing out the one with the pencil tip.