I was given an original Stanley 78 plane which I have restored as it was covered in rust paint and god knows what else , it was in the original box or at least the lower half containing all the rods etc . The blade is not square and I’m not sure if there will be enough left if I bring the blade back to square. I’ve never seen one before so I have nothing to compare it to . My asks are : A can you get replacement blade if so where from . B do you think I can save the original blade . C what angle should I set the blades at when re honing . Appreciate your feedback.