Try these folks on eBay. They have really really nice tartan at a good price, and many of the tartans are unusual. But they are selling out fast. Just look carefully to make sure you are buying the weight tartan that you want, and be sure to click "see all items in the store" so that you don't miss any of the tartans:

http://search.stores.ebay.com/CLANTA...149017QQsofpZ0