Bro, I am not trying to dog you or make fun but it is really annoying when I see someone who keeps asking for help when they can help them self. A quick google search will pull up quite a bit of information. I have seen several threads from you asking for clay, wig heads, pep files, and reference pics. Moth Monty gave you the pics he is using and you ask for more. Do a search for sith stalker and you will find a ton or follow his advise about FlagshipEclipse.
There are several sights out there for mask making equipment ( Monster maker is my fav they sell a kit that comes with every thing you need, clay a head to sculpt on, latex, the works). When you asked me to talk to the guys/gals over at TDH for you it screamed LAZY to me and kind of p'd me off as did the requests for more pics after you had been informed where one of the best sources to find them(twice). After a certain point I take off the kid gloves, and tend to be quite blunt. Hopefully you can take some heart from this and start to do some footwork yourself. Believe me I have been in your shoes. I also do SCA and no one in my group does anything outside of Europe for personas, mine is Japanese, so I have to strike out and do all the leg work myself. I have to finde other SCAdians who also do this type of persona myself.
Your situation is not so dissimilar as there are few people who have attempted this costume however their is a ton of info on it you just need to look.