Not sure about that one but have you seen these
They are the correct stepper, same supplier as the Amazon link in the Parts list, but from their own site and so ship everywhere (Amazon wouldn’t ship them to me in New Zealand). Slightly more expensive and not free shipping but it is what I am using and they were delivered within 5 working days using TNT. I gave up trying to find them on Ali Express and they wouldn’t have arrived that quickly using China Post!
Those are the same ones I got on ebay and they have been working fine. I have cut 1/2 plywood and was using a dremel for the spindle.