I'm sure someone here must have one in a portable case to show you, and maybe a case to sell because they are putting their machine in a table. I would suggest calling Singer. They should be able to tell you which cases it can fit into properly. Or- keep it in the car and watch Craigslist, visit thrift shops and hope for a cheap junker/donor with a good case and try the fit? Look at the machines on EBay and see what cases 15-91's come in. We Really need a separate section for buying/selling Vintage/Antique sewing machines and parts. Good Luck- I'm sure a case will appear soon!