In most states with a sales tax you cannot shop at wholesale or to the trade businesses because you don’t have a resale license. It’s a little different in Oregon. Many wholesale business sell to individuals if you are respectful and don’t demand a filial retail experience. My body shop sent me here for upholstery adhesive. They have many lines of upholstery materials for vehicles and furniture. Some may be special order. And they are one of the most complete providers in the country for them, many of their customers are out of state. They would be a good source of specific upholstery supplies.