The kits are cheap at $10. I don't know if the shaft is available, but I kept the parts anyway. I wouldn't call the rebuild easy either based on the sanding of the rubber plug to 1/16" +/- .005". That was a pain in the butt. It may have been a little too tall, but it didn't matter after I saw the shaft was bent. And I treated that thing like raw eggs too....

So I would need two shafts and one rubber plug. Versus buying two new master cylinders.