The website board specifications suggest that the Futura 133 comes with a std. Tuttle
fin box, as does the larger Futura 144.
There is normally no problem with putting a std. Tuttle fin up to about 58 cm in a board with a std. Tuttle fin box. At about 60 cm and larger you could run into a problem with the shallower std. Tuttle. That's why fins longer than 58 cm usually come only with Deep Tuttle fin roots.
You may find that the stock R13 Race SL 480 works pretty well when you are powered up, even on your 9.0 m2 rig. When underpowered, a 6 cm larger fin may get you plaing a bit earlier, and may help you stay upwind, due to the longer span and more surface area in the foil.
If you are not planing, the larger fin really won't help you to stay upwind.
When "slogging" you will need to use the shape in the bottom of the board and the upwind rail to sail upwind.
You may find that aftermarket 54 cm fins are a little too large/powerful and may slow you down slightly on the top end.
So, there will be no problem with using the 54 cm aftermarket fin, but finding one that's really "matched" with the Futura 133 may take more than one try.
Hope this helps,