I've done the plaster cast with foam fill then removal of the plaster. It turned out okay. The only major problem I had during the casting was about 15 minutes in I was VERY claustrophobic and still had to stay in the casting for another 15 minutes till it was dry. As a result I was breathing heavy and the cast took the shape of my expanded stomach and chest instead of my regular size. So it is great for making things that will be loose or skim, but is not great for tailored looks. I think if I was going to do another one of these I would go with the amalgam stuff that dentists use and only do half of my body at a time then join the pieces. Another thing you have to remember is that when you cast or amalgam you need to remain standing still the entire time. If you try to do it laying down your body curves move with gravity. Also make sure you mark your body and the cast at all the pertinent points, center front, back, sides, and make sure that the marks line up before you close to fill.
I'm in Stockton. Modesto isn't too far. I'm totally willing and able to travel or possibly to host. I'm a seamstress looking to meet more folks who are interested in not only sewing but crafty stuff in general. My current projects include several sewing projects, paper lanterns, invitations, wire arts, and brewing beer.