Where to buy replacement signal light

[comwiz7]

We lost our signal light and I have had no luck finding where to buy a replacement. Does anybody know where we can get one?

[Vikesrock]

*Demonstrates a cast, then hands fishing pole to Joey*

http://usfirst.org/uploadedFiles/Where%20to%20get%20more%20Rev%20A.pdf

It is called a Panel signal device and the linked document was found on this page:
http://usfirst.org/community/frc/content.aspx?id=452