I have not had one of those, but from the looks of it I think it may take the same bobbin case as a Kenmore 117 series, made by White. Maybe Janey will come along and tell us this machine was made by White also.
There are some posts on trying to deal with the drive wheel flat spots. I have used rubber tubing, something such as vacuum tubing from an auto parts store, it can take some worth to fit a piece over the drive wheel but can work wonders.