Almost looks just like an outboard pull cord such as this https://www.amazon.com/Co-parts-Outboard-Handle-Yamaha-Starter/dp/B07FBV5QQD.....
If it is stainless wire encased in a white coating maybe you could just replace the cable with https://www.westmarine.com/buy/alps-wire-rope--7-x-7-vinyl-covered-lifeline--P012046835?recordNum=2. This is commonly used as sailboat lifeline cable available in different sizes.........