One of my favorite stores online to buy fabric is: www.thousandsofbolts.com
Their fabric quality is fantastic, shipping is very reasonable and quick. The fabric has always been more beautiful then the images online. I have never been even slightly disappointed with them.
I have also gotten lots of fabric on Ebay. Some is good but the majority was not. After purchasing pieces that had faded in spots, been cut irregularly and smelled terribly of tobacco I stick to what I know is good.
Give Thousands of bolts a try, I think you'll be very happy.
I am not affiliated with them at all but feel it is important to share the name
of an online company that actually sells top quality fabrics and has great customer service too.