Get an HDTV adapter by searching for it on the Samsung.com website or on Amazon.com. If you have trouble finding what you seek, consult the customer service department of either website.
Use the search feature of the Samsung.com website to find your desired HDTV adapter. Type "HDTV adapter" in the search bar on the upper right corner of the website. This brings up a list of results featuring a brief description of the item and a picture. Clicking on the description of the picture brings up a fuller description of the product and its price and availability. In most cases, the adapter can be ordered online and shipped to your home, or you can use the site to check for the availability of the product at any nearby stores.
Use the search feature at Amazon.com by typing "Samsung HDTV adapter" in the search bar found at the top of the page. This brings up a list of brief descriptions and images that you can further narrow by selecting one of the categories on the left and revealing only those results. Clicking on an image or description brings up a fuller description and the price of the item. If different vendors are selling the same product, this may give you the option to buy from different places at different price points.