The Scourges' arms and the Warriors' arms are nearly identical except for the weapons they are carrying. I actually used one of my spare Scourge arms on a Wych, so it should work perfectly for Warriors.
"The time would be easy to know, for then mankind would have become as the Great Old Ones; free and wild and beyond good and evil, with laws and morals thrown aside and all men shouting and killing and reveling in joy. Then the liberated Old Ones would teach them new ways to shout and kill and revel and enjoy themselves, and all the earth would flame with a holocaust of ecstasy and freedom." -H.P. Lovecraft, The Call of Cthulhu