sp1in3

Hello everyone, Typically I just lurk and search the forum, but I couldn't find any information on a right angle binder for a Singer 211a166aa. I've found that the 211a and 211u series are the same, but the binding options I'm seeing are for 111w/g and 211w/g machines. Would these fit my machine? Let me know if a photo would help. Cheers!