I made these cluster frames & clusters using the kit Bite! by Tiny Turtle Designs. it is a great black & white kit from TTD, perfect for Halloween! You can purchase the kit at the store here http://tinyturtledesigns.com/store/. There are many elements in the kit that can be used in place of a tube.
I hope you can find a use for these - I had a lot of fun playing with the kit!
To download, simply click on the image to open full size,
then right click and select save image as.