I just bought one for DD's 127 machine. I got it from Sharp Sewing in LA. Sew-Classic.com has a reasonable price and more than one from which to choose. There are also rubber ones now and haven't tried one of those yet. You can also get belt dressing, which is a refined form of linseed oil, that helps the belt get more traction. Don't spray it on directly, but wipe it on with a rag. Wetting ever so slightly with water will help for a while, but dries out the leather and will eventually crack it. I also recommend having a spare belt. Sew-Classic.com has a tutorial on how to replace the belt and how to stretch it to avoid problems later. It is all free and can be seen on their web site. I will order my next belt from them for my White Rotary, which belonged to my mother. Jennie there is very helpful, as she is an expert and knows her stuff. She is glad to share her knowledge with all who ask.