I'm in the process of cloning my wife's 1923 Autoknitter Cylinder. My version should be functionally identical but also be optimised for 3D Printing. The model is highly parametric, meaning I can very easily change the number of needle slots. The model shown here is a 54 slot cylinder.
One problem we may run into is the fact that these machines were made much more by hand than they would be today. That means that from one Auto Knitter to another the parts are less interchangeable. This could make it difficult to mass produce these, but I'm willing to give it a go.
When these start going on sale, if you purchase one and find it doesn't fit, I'd like to work with you to make a new version that does.