Luxire, 'check' shirting fabrics*, sorted by price (lowest first). Knock yourself out:
edit - I just clicked on that link, and some of the post-search filtering doesn't come through in the URL. Click on the 'Dress Shirt (610)' radio button on the left to filter a bit better
* Kinda - Luxire's site is very weird, and they seem to have created multiple categories with ostensibly the same purpose. So there's...