Appliance Parts Pros and Rakuten are two companies that sell power cords for dryers. They sell a universal cord that is 4 feet long, contains three wires and carries 30 amps. For most dryers that do not come with a cord, this is a suitable part.
The instructions for attaching a dryer power cord are found in the owner's manual for most dryers, and it is a job that many people can complete without the help of a professional. Appliance Parts Pros and Rakuten offer expedited and standard options for shipping, depending on how quickly the purchaser needs the cord.