Operator & handle - 1960 awning window, left & right

The installed photo is a right-side operator (the arm is broken so it's not functional). The other three are a unintstalled left side operator after cleaning off several layers of paint. The most pressing need is to find white or unpainted crank handles to fit this style operator -- there are 12 ridges on the winding pin. The operator is 5 1/4" tall and 5/8" wide. Winding pin is about 5/16" in diameter, including the ridges.

There are no names, numbers or any other markings. The house is in Columbus, GA, built in 1960. All the windows are original to the house.

The house is under contract to sell, with a closing in 9 days. At the least, I need to find crank handles that work with this operator, to meet the lender requirement that one window per room opens. One (right side, handle on left) operator has a broken arm (see photo), and it would be great to find a replacement that would fit and work.