They have a variety of stuff but not sure if there is any grey
They carry upholstery vinyl. I don't know about the color. Call the store and ask
They did carry upholstery fabric. They do carry vinyl. I am not sure what Shades they carry. It's a large enough store that I would take a chance. There is a larger one up in Quakertown. Or you could order online.
Thanks! Your answer is awaiting moderation.