Your local auto parts store should be able to look in the specs. section of their brake book and be able to find the individual parts for an 1 1/2 bore. They might not find it under it's application. I rebuilt the master cyl. on my '48 2ton, and I think the local Bumper to Bumper ordered a kit and had it the next day. I don't remember if it was 1 1/4 or 1 1/2 though. Maybe fire trucks were bigger? Good luck.
