I love making egg, semolina, and wheat pasta at home, but my home pasta maker (a KitchenAid attachment with a roller and two cutter blades) does only basic fettucini and spaghetti shapes plus whatever I cut the sheets to myself. Is it possible using either a by-hand technique or another machine to make elbow pasta or other round shapes at home, or is this something I have to stick to buying?
You should be able to buy a pasta plate that will get you what you need.
The link is not a recommendation, just am example of what you are looking for.
I just saw a machine for elbow macaroni called "pasta perfetto 900". May be foreign but was definitely making elbows