Ralph,

When you say "adjustable," are you looking for something that will allow expansion/contraction of chest, waist, hips, etc., or are you looking for posable figures? For the former, I don't know of many options outside of dressmaker's forms. We have a bunch of old Dritz "My Double" forms, which are made of a coated chicken wire like material, and can be drawn in or pushed out using a system of rods and clips. To be honest, they look pretty flimsy and hard to use, so they sit in a box in outside storage.

If you're looking for posable, I had created a posable set of legs that is posted elsewhere here on the forum. I never did find the time to perfect an upper torso, but hope to in the not-too-distant future. I'd be happy to brainstorm with you.