Billings Best Kept Secret; Introducing Warehouse to Design. Design Supply’s unique venue is home to a wide variety of interior design tools and accessories. Alongside our hand chosen inventory one can find versatile, statement pieces. We believe that each home deserves to express a statement. For lack of better words, Design Supply by Moss Home provides the UMPH, BAAM, and POP your look needs to be noticed! In addition, our intimate, warehouse setting allows us to personally invest creativity in your home decor projects. Come harvest design ideas from our inventive displays every Thursday and Saturday from 10am to 5pm! See how great we can make a warehouse look!