I have made several V Springs in the past using the method Grouse Guy cited. All to the best of my knowledge have given good service, at least the ones I have not lost contact with. I believe that Brownell's may carry spring stock, Dixie Gun Works I assume still does. I once had some from the now defunct I believe Frank Mittermeer firm.
As I recall 1075 will make a good spring, I believe that 1095 is too hard & apt to break. I am sure there are other alloys now in use but these plain carbon steels will make long lasting springs & lend themselves well to "Primitive" methods of heat treating.
