Off the top of my head (I could be mistaken..), the 04-05's are 30mm odd shorter than your FZ1 forks, the '08's only about 15mm shorter and work better with the FZ1's geometry.
I believe the '09's bolt right in but they don't have full adjustment on each leg, its a similar setup to what your wanting to change. One leg is comp adjustment, the other leg has rebound adjustment.
Ive done this mod with '08 R1 forks.
'08 R1 Forks £300
'08 R1 spindle £30
6 pot radial brakes (brand new 0 miles!) £150
R1 Radial M/C £80
Spacers instead of 310mm rotors £20
An easy modification, pretty much everything bolts right in.