Anybody have a few extras of the short pin plugs Hickok used on its tube testers (for the grid/plate lead) and old meters (like the 209 VTVM)? Were they proprietary? The pins are bigger around but shorter than so-called pin plugs and smaller than banana plugs. I could use about half a dozen for various test leads. Thanks. 73, Avery W3AVE in Potomac, Md.