You can get a .69 caliber mold from Lee Precision.
Lyman makes a .715 and a .735
The Lee's are aluminum, way cheaper, and work OK as long as you don't cast too fast and overheat them.
The Lymans are more expensve (handles are ordered separately, so don't forget to order them as well). They are steel... take a few casts to heat up but they don't overheat very easily.
Try Dixie Gun Works or Midway .
Rick