There are a few steps you can take to obtain an oil-free refrigerated compressed air dryer:

Research: Start by researching different manufacturers and suppliers of oil-free refrigerated compressed air dryers. 

Contact Suppliers: Contact the suppliers and ask for information on their oil-free refrigerated compressed air dryers. Ask for product specifications, pricing, and availability.

Assess your Needs: Determine your air flow requirements, dew point, and other specific needs that you may have. This will help you choose the right size and type of dryer for your application.

Compare Different Models: Compare different models of oil-free refrigerated compressed air dryers from different suppliers. Look at features, warranties, and pricing to determine which model best suits your needs and budget.

Request a Quote: Once you have identified the right model, request a quote from the supplier. Make sure that the quote includes all of the necessary components, such as filters and drain valves, and that there are no hidden fees.

Purchase and Install: After you have selected a supplier and received a quote, purchase and install your oil-free refrigerated compressed air dryer according to the manufacturer's instructions.