I'm sorry but I am showing that currently this item is a single function. The only 4 function showerhead I can find is the 3838EP which you can find here.
This is not recommended, but if you have experience with this type of thing it can be done. It will void the warranty, but it can be done if you feel comfortable with cutting the bar. Things to watch out for would be when you cut the bar make sure that it doesn't crack and that it is not cut to short.