Super Duper is the best place to shop for speech therapy materials -- whether it be evaluation tools or therapy supplies. I would say that Super Duper has THE best selection of speech therapy materials when rating all the therapy catalogs that I have 'window' shopped. The quality of materials is superb! The prices are extremely reasonable. Customer service support is excellent -- supportive and knowledgeable. If you have questions regarding evaluation or therapy materials, they have speech therapists on staff to answer your questions.
Since I don't live in Greenville, I don't know if Super Duper actually has a store front. My dealing with them have been via online ordering and catalog shopping. Whenever I am looking for new speech therapy materials, I always check out Super Duper first.