I have an OLD Viking sewing machine and need to get a walking foot. I checked the Viking web site and they do not go back that far. I messed up a nice baby quilt by the fabric not going through nicely. Any suggestions on where to get it? It is model 64 60 made around 1977. I love it and will not give it up, sewen many tent, jeans, and upholstery, as I raised 3 sons.