I also am looking for Bernina 730 foot pedal. When I was sewing one day the machine kept running even when I took my foot off the pedal, I had to pull the plug to stop it. We took the foot pedal apart and found that the carbon discs inside the rheostat had all disintegrated to powder. We have had no luck finding a replacement. The best thing so far is that a repairman in Lethbridge, Alberta said that he could rewire the original cord into a new generic foot pedal. However, I have read that a newer type pedal could possibly cause surges which could burn the motor out. I love this machine and hate to think of replacing it, it still sews so beautifully.
Sharon in Cranbrook, B.C., April 2009