Here is some I posted on in another thread:
Here is a pic of one piece of artificial structure (SOS) I made today. I bought some clearance Christmas Garland from a craft store, 3 - 19 foot pieces for $2.50 each. After I cut each strand in half then doubled them up, I folded them in half, twisted the lengths together, and added 2 oz. pyramid sinkers to the end of each strand two piece strand. I ended up with three 5 foot long, double strand pieces that I attached with a steel leader to some 30# line. I had some styrafoam (from some electronics) that I tied them to. I put the styrafoam inside of some old socks to keep the fishing line from cutting through it.
The garland is wire, so I can change the shape if it to make it appear fuller, as long as I can get it in and out of the hole. Now.... I hope it works.