About a dozen years ago I saw an instrument that had the neck of a five-string banjo(including the fifth string peg), and the body of a 'taterbug mandolin. Does anybody have a clue as to what it is called and where one could be obtained? It was strung like a banjo, not double-strung like a mandolin. I didn't hear it played, but I was intrigued by the construction. It looked very well made (factory)--not just two different instruments cobbbled together in somebody's workshop. Any help?