If anyone is interested in making their own dress form, DH and I made "mine" last week following this tutorial.
I used one whole 50m roll and about a half of a second. I've then filled it with newspaper but I may refill later with expanding plumbers foam (will probably need 4-5 cans though)
Anyway it is now sitting on my table and is great! Helps with fitting tops, where previously I had to either pin myself or have DH stick pins into me all the while complaining!
Did take about 2 hours to do though!