Log on to Miller's official website at MillerWelds.com. Click on the "Where to Buy" tab.
Enter your location information -- either a postal zip code, or city and state. Click "Search" and the website will locate the nearest retail locations that carry Miller supplies.
Take down the retail outlet's'contact information. Call the service desk and make sure that the retail outlet has the replacement part you need in stock.
If there are no retail outlets that carry the necessary parts, return to the official Miller welding website. Click on the "Products" tab, and then, in the drop-down menu, the "Service Parts" tab.
Search for your specific part by its serial number. If you do not know the serial number, click on the owner's manual download icon to download a PDF and find the necessary serial number.
Enter the part's serial number into the database to check for availability. If available, click "Buy Now" and follow the website's instructions for payment and shipping.