Try calling Hunter and ask them. Their website may have pictures of a sisership. Compare that with what you have. Ask the previous owner. If there's no backstay, there's only a few ways the top of the mast could have gotten bent abnormally. One would involve not waiting for a drawbridge to open all the way. The other would be from getting run over by a forklift before getting stepped. You're going to have to do the legwork on this one, since you're the one who knows how much his mast is bent.