No offense, but replacing the barrel and doing another refinishing is only going to bring the gun further away from the way it shipped. I believe the serial number is on the barrel along with many other places.

Your best bet is to leave it as is. If it bothers you sell it and buy something else. You could sink $200 into a refinish and rebarrelled and the resulting gun might be worth $50 to $100 more than it is today and that's if you lucky.