I make alot of my own chutes, using all kinds of stuff. 1/4mil and 1/2mil mylar, 1/2mil giftwrap mylar sheets, alots of light weight shopping bags, mylar or plastic sheeting balloons, Drycleaner Bags (1/4mil or less), some Trashcan liners. Several weights of Rip-stop nylon, real Silk and other materals for the fabric stores.
Once you have the patterns made, and a table or board on which to cut them its really a breeze.
Kevlar thread and silver trim Monokote take care of most of the Shroudlines and attachments.
I make my own all the time - everything from 6" to 42" nylon chutes. You can get thin ripstop nylon for about 6 bucks a yard, sometimes less, at any decent fabric store. I use 1/8" nylon string for the lines, and they don't tangle like plastic chutes.