I really mean it when I say I love the duck hanger. Everything I cook on it has turned out great and it has become my favorite accessory. As it relates to the 21, he doesn’t have it on his website, but it may be worth a call to ask Dennis. He may have one made at the request. My only thought is the 23 has three spots for hanging and the 21 would be less, maybe only 1. To be fair to that though, a 21 is smaller cooking area so that probably would be ok. I’ve only cooked one thing at a time on mine so far and am obsessed with it. I’m planning on cooking three chickens in a couple of weeks and can’t wait. I’ll be sure to post pics! Sent from my iPad using Tapatalk