This is the third and final section on making your own DIY dress form! (Here is the INTRO post as well as Part 1 and Part 2 of the series.) What you need for this is a couple of yards of quilt padding, which you can get at most craft stores, and a couple of yards of a very stretchy and elastic knit fabric. (This is usually called 4 way stretch and has spandex or lycra or elastic or whatever you call it built into it. It's what you would make a skin-tight body suit out of. The padding is…