Bozzy, the steering wheel will physically fit on as all Stilo's share the same steering wheel; all that changes is the option of switches.
As to the functionality of the switches, I don't think they will work; from what I can tell on
ePER, you need a different set of column stalks so that you can plug the connector for the switches in, so that the signals will be picked up on the CAN line at the clockspring.
This is dependent on age; any Stilo BUILT before 11-2003 will need a whole new set of stalks, whereas Stilo's 11-2003 onwards will just require a new contact (around £70).
I maybe wrong, but hope that is of some use!