the silent one:
I did my trainig with DENBY transport, the 480 scanny i trained in C+E had a 3 over 3 range change and each gear could be split twice. Being new, eaton fuller dont mean nuffin to me, so dont know if its what your after.Matt
The Scania box is a synchro box, and can be looked at as a 12 speed.
I dont think many training schools will use constant mesh or Eaton, Fullers nowadays, but there was that Bill Wilford 
who ran a kenworth in kent
As Andy M said just use a normal training vehicle then impress your new employers with your skills as a newbie on a fuller 
As you already have your C (class 2) you only have to blag a trailer off someone