Here are links to two stores that we are aware of that sell heirloom fabrics:
Chadwick's Heirlooms - (804) 285-3355 / Richmond, VA
Peanut Butter and Jelly Kids - (251)479-8811 / Mobile, AL
If you don't see what you are looking for, I would suggest doing a general web search for:
heirloom fabrics (Insert word, such as batiste) include the plus signs and quotes when searching.
or search "Heirloom sewing supplies" (with the quotes) and many stores will come up in your search.