I just purchased my chair sashes from tableclothfactory.com. They recently had a 20% sale, so the sashes that were normally 75 cents were 49 cents each. Their sashes are crystal organza. Tablelinendirect.com has organza sashes for 45 cents each and crystal organza for 99cents each. Crystal organza is darker and has more shimmer.
I priced fabric for the gazebo sheers on Amazon for $25 each. I decided to purchase the exotic gazebo (thanks Murmel) because I get the two sheers, two large hanging corsages, and rose petals from 48 flowers for $250. I'm trying to limit how much luggage I'll have to pay for.