Value + Label in Layer Properties

I am using an ArcSDE with SQL Server Express Geodatabase in 10.1.0.

I have a Pipelines Feature Class which has a Coded Domain assigned to the Product Field.

The Coded Domain is as follows:

Code Description
NG Natural Gas
DS Digested Sludge
RW Recycled Water

In ArcMap, under Layer Properties - Symbology; In Categories - Unique Values, Value shows the Domain Code, and Label shows the Domain Description. In the Layout Window, I would like to show in the Legend the Domain Code and the Domain Description. I would like the Legend to appear like this:

NG, Natural Gas
DS, Digested Sludge
RW, Recycled Water

Is there any way to to do this?

I have almost 100 different Pipelines each with different Products. This equals almost 100 Domain Codes and Descriptions. I do not want to have to manually type these in the Legend each time I make a map. I know I could make a new Column in the Feature Class which holds the Domain Code and create the Legend I want that way as well by using Unique Values many fields. But, that defeats the whole purpose of a Domain.