Anyone have any of the now discontinued Comet HF antennas,such as OP-7Mhz, OP-21Mhz, OP--80/75. This is the part that sticks down into the bottom shaft. I use them in my mobile station...... Got any? I have the OP-14Mhz es the OP-28Mhz. 73 es gd DXing, SAH-K4KU