Welcome to the QB from SE Michigan. I only wish I could help you. My grace frame is made a bit different from yours. I have the OGF(Original Grace Frame), I am not sure any way that I would have that in my extra parts. I have upgraded track and the carriage and a few other things over the years and Grace Co. No longer makes replacement parts for my model either. Be hopeful someone may be able to help you out. You never know. Again welcome to the QB!