Usually I post only on the Ancients forum but I decided to ask a question here. I am looking to buy a US bond or US treasury security from the US Civil War era. The market is awash with Confederate material and I need no more of that, but finding a similar one from the US Union side is my present goal. I attended the Philly show last week and saw a number of them on display but could find none for sale. Does anyone know where such an object might be purchased or who might have one for sale? The usual on line dealers in currency apparently do not list any. Thanks.