Just as a quick guidline - there's two links on the Web Links (to the left) to stores that specifically sell Kilts. Dave, I know you have one already or it's on the way, but since it was mentioned, I thought I'd bring it up.
Both of them sell classical wool kilts, as well as more modern ones. One sells inexpensive acrylic kilts (that run about $30), the other sells "Utility" kilts that have pockets, velcro, and camo patterns (i.e. - not for KR!). Both do have a wide selection of different Tartans (plaid color schemes), which is nice.