Thanks Chas. I was looking through Mouser and got overwhelmed pretty quickly by the different types. I assumed that there was a specific sizing that would be required (i.e. OD of the plug and inner pin). Also wasn't 100% sure if there could be different setups for polarity. Although as I look I see that you may be correct that it may be fairly standard at 1.2 mm x 5.5 mm.
Was holding out hope that someone had come across this before and could say, "oh yeah that is part #123ABC". Was worth a shot!