Dress Form

I like Adjustaform. They cost about £120 in shops, depending on the size. I got mine from Wimbledon Sewing as their prices were better:

have a Junior, a Small, and a Full Figure in this make, and find them the best. My oldest one is 25 years old, and only in the last year has she shown signs of wear and developed a need for refurbishment (I need to do a small repair where the shell has cracked through mishandling/storage, and some of the cloth cover needs to be glued back down). I use them professionally, for my customers.

Did you consider...

I have a UniquelyYou form and find it works especially well for my figure type (large bust/small rib cage). The form is totally pinable and is made of very dense foam which you fit with its own cover. The cover can be easily altered to match your own body shape/measurements and the foam molds to it accordingly. It's very cool. :) Here's a review: