Peckish

Hello! I'm looking for a replacement foot pedal for a Kenmore 158.18150, and I'm hoping someone here can point me in a good direction.
This Kenmore belongs to my 74 year old mom, she took it in for repair and the tech narrowed it down to an electrical issue with the foot pedal but he told her he can't fix wiring issues. My mom *thinks* the cord got pinched, but she's not the best at diagnosing issues, so I don't know for sure if that's the issue. I'd happily buy her a new machine, but she's had this one since 1970-something and it's difficult for her to learn new things.
TIA