Dear all, we also offer prayer ropes in many variations (33, 100 and 300knot). Ours come from Orthodox Churches from Greece, Russia, Macedonia and Serbia.
Although I like the ones Mr. Phillip_Rolfes offers, they look magnificent! But I too think it would be better to replace the skulls with the olive tree beads or cross beads.
We do not offer them with olive tree beads, but we do have them with cross beads. For the ones interested here is the url of the website: prayer-bracelet(dot)com
Also, we have a lot of articles in our blog about the history of the prayer rope, do a search for St. Anthony the Great on the website and you will find the series of articles.
Regards and God Bless,
Max