I've noticed that nobody has jumped on this thread to offer anything. What I'm going to say might not be what you want to hear, but its my honest opinon based on 2 years worth of experience attempting to do my own stabilizing.
First and foremost, unless its just something you plain want to do, my advice is to send the mateirals you want stabilized to a professional company....you WILL spend a great deal of money and time, often without favorable results doing it yourself. The reasons I say that are:
-Unless you either have, or can build "industrial grade" vacuum chambers and pressure vessels, results will be spotty at best.
-I went through a ton of different "stabilizing agents" and until I got into the stuff that was $100+ per gallon, the results simply were not satisfactory. (I don't mean to step on anyone's toes, but the stabilizing agents that are less costly then that simply do not work).
-When I got to the point of spending that much on stabilizing agents, I quickly found that my equipment wasn't capable of the long durations of vacuum and pressure that were recommended/required to achieve complete penetration/saturation of the materials I wished to stabilize.
-Be aware that "stabilizing" isn't a complete solution. Stabilizing will not prevent "movement" of a natural material...it will only minimize it within the boundaries of the given material.
-Personally I only know of one individual who has achieved what I would consider "good" results with home shop stabilizing....and that person spent over $12K on equipment over a 3 year period, and wasted literally thousands of dollars in woods and other handle materials before he was able to achieve what he termed "good" results.
I don't mean to be a nay-sayer......but unless you have a really big wallet, and are willing to break a LOT of eggs to make the cake, its much simpler and far less expensive to send your material to a professional.