Devil’s Staircase Wild West Role Playing is not a supplement published by Azukail Games, but it is written by Peter Rudin-Burgess, who has written many of the RolemasterBlog Adventure Hooks that can be found in the Adventures section.
This is a Wild West game that is now available as a public playtest as a free supplement from RPGNow. The game’s mechanic is based on using standard cards to determine actions rather than dice.
Check out Devil’s Staircase Wild West Role Playing.