no problem- sometimes it is difficult to find the right forum, or to get an answer there.
Yes, the stealing skill can and must be used to get certain rares or weapons, and they suggest that there will be more coming. You will need at least gm stealing to get them, and this one is not sure if 120 would make that any easier. I do steal consumables from some creatures when I check on spawns- some of those, the life giving seeds, mana draughts, strength balms- are nice to have and why should I buy when I can get myself? But it isn't my specialty. The good folk on the rares thief forum may be able to give you better suggestions.