The Radio Information Board

Does anyone have a part number or know someone who is selling a genuine EFJ DTMF microphone for the 5300? I have an aftermarket mic that came with my radio. It's from the Shure Company. Unfortunately, when you press the digits, it automatically transmits a DTMF tone. I am looking for the genuine microphone that allows you to access all of the additional features that you can't fit on the six button control head. I can sit there all day and press the buttons on the mic and all day long they will transmit tones instead of allowing me to control the other important radio features that I need to use.

Thanks!