The way that is normally done in a dropdown is to have a "Text" value which
is displayed and a "Value" value which holds the text to be used.  You would
have to get the source (available) for the toolkit and change the logic
since the webservice routine that is used returns a simple array of strings.
You would need an array of objects that contain a text/value pair.

I looked into the code but this is the first time I have looked at the code
for the extenders and my Javascript is not that great.

LS