Customer Service training

Many many years ago, I took the Xerox Customer Service Training. It was probably the most useful training I have taken in my professional career. The videos of the training were a valued resource.
Where I’m working now, the programmers and IT support staff need a good customer service training. Does anyone know if the Xerox training is still available? If not, what resources do you suggest to train and develop custome support skills?
Thanks for your help.