If, by worn out, you mean all of the chrome has worn off, you can take it to a metal refinisher and have them rechrome it. Should look like new. But, if it is all rounded over, and pitted, there may not be enough left to restore. The surface would need to be smoothed over, as plating just follows the existing surface...got bumps, replated and shiney bumps!
One of the pros may know of a restoration or current product that might fit.