Do you mean a roach? if so you can order the kits (or ready made) from crazy crow or Noc Bay.
www.nocbay.com ive gotten a lot of stuff from them. Noc bay has more colors of deertails to choose from. Its kind of a lengthy process, but worth it. i know that i dont have the patcience to do a roach, however my mom tied my son two of them. (one was stolen) If you dont have the time or the patcience to tie it, i would invest in one. they are expensive, but if you get a good size and a color, you can use it forever. the first roach took my my 2 full days (after she sorted the guard hair, (it has to be pretty even, like within a half inch)
You can buy a video from noc bay that explains its REALLY good if you decide to tie one. :) good luck!
Oh, powwowbum makes them, and ive heard hes really reasonable price wise. :)
Niijii's Mom