Tower has proctor pulleys.
http://www3.towerhobbies.com/cgi-bin...ARCH=PULLEY+++
If you want to save approximately the gross national product of Uganda, I just use 2-56 eyebolts. They work just like the guides on a fishing rod. Not as scale, but they work as well(maybe better) Also from tower:
http://www3.towerhobbies.com/cgi-bin...=RF&search3=Go