Walkertown fabrics closed a long time ago and they were the best on earth (Marilyn and DonnaB can vouch for that) but I've been shopping at Spoonflower and at Mary Jo's in Gastonia NC. Mary Jo's is wonderful, worth a trip if you can get there, but they sell online too, maryjofabrics.com
Spoonflower is great for designing for own fabric and bringing it to life. I've been tweaking a sample of my clan tartan for forever and not getting it quite right scale wise (for dolls) but it's really neat to try to create your own.

Always sad to see any brick and mortar store close, I fear we will see a lot more of it over the decades. As wonderful as shopping on the internet is, it has pretty much killed the local shopping experience. Shop local if you possibly can, seriously small mom and pop places. They may all be gone in our lifetimes.