Unfortunatly, there isn't. Been searching since '94 for one. About the only game for one is to find the very rare '60-'62 Truck Positraction diff. I managed to find one, it was in a stripped truck that was a cab ad frame. A freind of mine was willing to go in one it to get the cab and chassis, I wanted the diff. As soon as the seller heard that we suspected it was a Posi (I spotted the tag) he decided not to sell the truck.
