Don't rebuild the cable. You should contact the manufacturer of the power cord. Under the terms of their product liability insurance, for which they pay hefty premiums, they should be more than happy to replace it 'no questions asked'.
Ground Question-Power Cords
On one of the power conditioners I own (counterpoint Pac5) has a feature where it will diagnose the status of the electrical line..open hot, open neutral, open ground, hot and ground reversed, hot and neutral reversed, and correct...Ive noticed that when changing after market power cords into the PAC 5 the status changes, a cord I have has a neutral and ground reversed, is this possible and is it fixable? Would this create ground hum problems in the system? Thanks for the feedback!