Technically. if the only thing wrong was the one rear hole broken out, those two holes are only there to position the head stock at approximately the correct left-to-right position. If that were the only damage, I wouldn't worry about it. But the rest of the damage may be important. I would recommend replacement of the bed.
Also, if it is really a Craftsman, it is a 12". If it is really a 10", it is an Atlas. However, although the Atlas and Craftsman used different head-stocks and tail-stocks, the beds are interchangeable, except that until about 1948 they each came in four different lengths. And the legs under the beds may be different, depending upon vintage.