You can buy some from redcharm on AT. Shes cheap and has about every color imaginable. http://www.archerytalk.com/vb/showthread.php?t=201735 $2.99 for 3 feet and she will ship it for $1.50
You can see this thread for how to tie one in http://www.huntingnet.com/forum/tm.aspx?m=1411984&mpage=2
Brian