TR3A front brake piston diameter?

[JAMES_S_WALLACE@HP-Canada-om1.om.hp.com]

Item Subject: cc:Mail Text
     1. Can anyone provide this spec? I'm looking for the diameter with 
     tolerance, as well as the length, so that I can have a local friendly 
     machinist make up a set from stainless steel.
     2. More generally, I don't know where to find such numbers; do the 
     Bentley manuals have them?
     
     TIA,
     Jim Wallace
     TR3a >TS60000