Great tasting Homemade tortillas
There is a state inspected Tex-Mex food factory/store here in San Antonio. It is called Rudy's Mexican Food Products.
They sell pretty much everything, especially in large quantities - tortillas, tamales, chicharrones, spices, etc.. Their 50 count flour tortillas are $4.00 a bag, and they ship anywhere.
San Antonio used to have an annual best factory made tamale contest, in both the machine made and handmade categories. However, they cancelled the contest because Rudy's kept winning every year. That should tell you something about the quality of their products.
Call at 8:30 AM CST, and ask for Rudy (210) 533-5436. Customer friendly, they are.
Do you live in or near St. Louis? Might want to try here:
Nachomama's 9643 Manchester (314) 961-9110. Nachomama's makes almost all of the food from scratch. Fresh homemade flour tortillas...
I can't vouch for the place, but a quickie Google search turned it up. If you go, they might be willing to sell you just tortillas to take home.