I wouldn't call her, she may decide she wants the machine back
.....
There several Yahoo sites that are Pfaff machines. Also, several buy/sell sites there too. One is SewItsForSale and someone may have some feet left over from their old machines. They should be snap on feet and most of the models should fit, may not be perfect to the feed dogs, but work. My old mechanical feet fit on my 7570 and vice-versa...