If you’re looking for 8 inches nylon caster wheels, you can check online marketplaces like Amazon, eBay, or specialized hardware stores. Make sure to specify your requirements, such as load capacity and type of usage, to find the most suitable caster wheels for your needs. You may also want to explore local hardware stores or industrial supply shops for a more immediate option. Always check customer reviews and product specifications to ensure the quality and compatibility of the caster wheels with your intended use.