What year is your 2 t0n? Rockauto.com has wheel cylinders and rebuild kits for many applications. Do a search of Spanky's posts he has had good luck with Aleretta truck Parts. I got a master cylinder for my 38 from local parts house. the 2 ton has a larger bore than the master cylinders for smaller trucks and may have insufficent volume to properly activate all wheel cylinders on a 2 ton.