[Boatanchors] monaural headphones

[John King via Boatanchors]

I am looking for a source for monaural headphones. They do not need to be high fidelity. Before anyone tells me, I know that a  monaural to stereo adapter  can  be used or that the two channels can be jumpered and other jury rigged methods can be utilized but that is not what I am asking. I am merely looking for a source of monaural cans that were intended  to be used for that purpose on my numerous boatanchor receivers. Yes I have numerous matching speakers but often I want to check a speaker for a minute and don't want to move a speaker, turn the receiver around and fool with screws just to check out a receiver for a couple of minutes. If I sound like a grouchy old man, I guess I am, but years and  radio shack sales type electronics folks will make you that way. Thanks, 73 and SMILE !!!!!!!!!!!!!!!