Unless you can find NOS fenders I would repair the ones you have. A friend of mine went with repop fenders because his looked like yours and had problems fitting the new ones. Another body man told him he could have saved the original fenders and avoided all ao the fitting issues. I know my fenders were at least as bad as yours and my body guy used patch panels and I am happy with the results. He did all the body work so I can't say if but welding is the best way to go. Find a good body guy you can trust and go with his recomendations. Good luck!