You didn't give us a good view of the transmission, but I think that is a 1955-57 Chevy passenger car transmission. All the ones I ever saw looked just about like that (although the cast numbers could be different depending on a few factors). Good luck with it. Not by any stretch of the imagination my favorite 3 speed, but some consider it okay. Not sure who has synchro rings for them today. I'd call Wade Transmission & Gear in Dallas. 214-747-4868. They'd know if anyone would.
