Alternator Diode - Need Help with Part Number

Hi All,

I fly a 1975 337G Normally aspirated. THe front alternator was giving me trouble and after going through the troubleshooting process we found that the power diode (the one sitting on the front firewall that connects directly to the alternators output is bad. I have the parts manual and it does not make reference to this part. Does anyone know what this part # is and where to get it. It is a 70 amp power diode that sits inside a heat sink.

Any help is appreciated.

Thanks,

Chris