rear brake seal/piston compatibility

[iamhiding]

if you've been reading my thread you'll know why I'm asking this.

right, my 2000 and all pre-04 back brake callipers use a 38mmOD by 22mm long piston.
not sure about 04/05 dimensions, however if all post 03' happen to be the same then fire on.

anyway 06-09 is where my question lays, anyone know the piston dimensions for this generation?

been down all the usual means, parts fiches, cross referencing parts numbers on both seals and pistons and this is the first time I've ever come up completely dry when trying to figure something out like this. so any idea?

any help is appreciated
thanks,
B.