Went to True Value and picked up a paint stirring rod for about $15. Same hex size as the oil pump. Cut off the "stirring" end, sanded off the paint for the oil pump end, and it's the perfect length. They have these at Lowes and Home Depot also. Cheaper alternative. Cheers!
When I was younger I worked at a salvage yard and 90's ford taurus's automatic transmissions have the exact shaft. It just slips in behind the torque converter. A core transmission donated it to me.