A good friend of mine turned me onto this neeto little trick.  Instead of spending a lot of money on boning for the interior of your garments or for your costuming try using industrial zip ties.  They come in a big bundle at the hardware store.  One tie makes about two strips of boning or three depending on the structure you are going for.  They come in various lengths and can be easily cut with scissors.  I use an emery board or nail file to smooth and round the edges on the ends that are cut so they aren’t sharp or poke through the fabric when sewn in.  Be careful sewing them in cause they will break needles.  They are machine washable, a big plus and stiffer than traditional boning, so when you need that added really stiff look then here you go!  Works great for historical costuming.