I live in the area, and think you might be referring to "Weaver's Dry Goods, 108 W. Brubaker Valley Road, Lititz PA 17543
Phone: 717-627-1724. It's a nice shop with lots of fabric and a sale room. They also have a barn in the back which is only open once in awhile. Give them a call to find out if it's open during the show. If so, I think this is the place you've heard of.

I skipped Weaver's the past few times I've gone to Lancaster. I heard the owner fussing the ladies that work there for cutting a tiny bit more than requested. He seemed much more concerned about a few cents of fabric being given away for free than he did about the fact that he was correcting them for this right in front of me and a few other ladies in the shop. Needless to say, when it was time for them to cut for me, I watched like a hawk. I was afraid they would cut me short since they were shaken by his lecture.

I might give them another try for the barn sale though.

i believe the prior post was right, its weaver's. i didnt find the fabric great. prices were good. they are open 3rd weekend of the month, i believe. but as mentioned, call before you go. i'd rather go to martin's. 3.79 flat fold and there are loads and loads of fabric. and a nice quality.