Just picked up a well used Ithaca Model 37 Deerslayer. I had originally gone to the shop to put a 5906 on lay away but it was gone, so in order to make myself happy again I purchased the 37. It serial numbers to 1966 and is in good condition. I need to redo the stock and do a good cleaning. The only thing wrong is it is missing the original rear sight ( ladder type) someone replaced it with a folder. Anyone have knowledge of were I can get a replacement?