How do you buy them from a item mail? but I think i know what the ingredients are

Please tell me where to find these creatures?

phantom flesh - from evil ox
ivory horn - from vortex turtle
soft fur - scaly scabbles
antennae - from those flying bees can't remember the exact name)
elemental powder - from diff. monsters
evildoer's mask - flare imps, ghouls

ARE THESE REALLY THE INGREDIENTS FOR AN EXTENSION STONE?
CAN SOMEONE PLEASE VERIFY IT? WITH ACTUAL EVIDENCE

This is probably it if so can someone please tell me in very specific detail how to buy an item mail?

like number the steps one by one

1. do this
2. then do this
and so on

And anyone one who wants to answer this should be at least level 40 or at least give a good explain if your going to give an explanation that isn't very long or very vague

THEN YOU DON"T KNOW HOW TO GET THE QUEST DONE SO PLEASE DON"T ANSWER