Singer has come out with a reproduction, cast iron, crank powered, sewing machine that can be converted into a treade machine, if you have the treadle or can be motorized, for a small up charge. The neatest part is that it costs only $99.00. I heard about if from All Brands and here is the link. This is not somthing I would buy but I do have an old electric machine with a smashed Bentwood case and I see they also sell replacements for those as well.
How neat is that?