This is one that I am currently working on for someone at work. These take alot of time (approximately 5-6 hrs depending on size). They contain about 90-180ft of paracord depending on length. Please let me know if you are interested. I can provide you with any information you need.
The end looks like this. I can do it as long or short as you want. I can also use the center cords or outer cords on the outside. I.E. I used the black strands to make the inside cobra and used the od green for the outer accent color on the rattler.