A few years ago, I emailed This n'that since I moved from that area to NC. and was going back for a visit. They said that they are an on-line business only.
While in Exton, you need to go up Rt. 322 to the Amish country.Visit SHADY Maple for the food (Amish Buffet) and Goods, the old style 5 and 10 for the stuff (some fabric, not much).
There is a fabric loft in Morgantown, Hayloft Fabrics. 150 Moreview Blvd. Morgantown. 610-286-5045. 2nd floor of Martins Country store. You will LOVE it. You can find them online.