Drake L-4B male vox plug
 

I have brought my L-4B linear out of storage, but I have lost the two prong
male VOX plug. Does anyone know where one might be located and what type
plug it is? I had assumed it was a 2-prong Jones plug with flat blades, but
the holes look circular in nature. Could someone give me some guidance on
the name and type of plug and where one might be purchased?