You should be able to go to the Brothers site and find a new foot pedal and cord. There are other sites that also sell the foot and cord.I saw one that looks like the original part on Amazon.com as well as here,
https://www.sewingpartsonline.com/se...pedal+and+cord . I have the same machine and have been using it on the original Grace Frame.
Or you may want to go back to the estate sale and see if it is still there.