Unless you're looking to change your gear ratio by getting a bigger or smaller chainring there really isn't any need to replace it and from the pic, it doesn't look very worn to me. Angie runs a 3/32" ring with a 1/8" cog and chain on her 721 and her drivetrain hardly ever makes a sound. Is your chain too tight/dry or is your chainline off?

If you're hell-bent on buying a 1/8" chainring, how much are you planning on spending? By the way - your bcd is 130.