how much would it cost for a second hand angle on/off and rail
one like in this pic
http://i188.photobucket.com/albums/z13/aza001400/0Mnn1XWYFL-lEz1GHLjVYoLMdSd370300.jpg
one like in this pic
http://i188.photobucket.com/albums/z13/aza001400/0Mnn1XWYFL-lEz1GHLjVYoLMdSd370300.jpg