Thank you Ken!
The name was on the tip o' my tongue, and I just couldn't get it. They are five pin DINs
The local Radio Shack could only offer me a blank stare, but I hear their website is extensive. Or I can go back to my "alma mater" (the Seattle Westin, where I was the morning A-V guy for too many years) and see if they have some floating around for some strange reason.