I've been researching on this and it seems that the injectors are the same between the two engines.

A tuning and remap company in the UK (I won't name it since I don't want this to be considered as advertisement) offers a Stage 2 remap for the 95HP version that I own, bringing the power up to 136HP. As far as I've read this is impossible with the stock turbo and the company even states on the remap page that the two engines (95HP and 115HP) are very very similar. This leads me to believe that there shouldn't be any other differences aside from the actual turbine.
But I haven't been able to find clutch kits for these two models so I cannot yet say if the clutch needs an upgrade too, in order to deal with the extra torque.

I've contacted my local Ford authorized service and they said they do not offer such upgrades as the one I've described in the post above. But the service is multi-make. I will contact the service in my home town which is dedicated to Ford vehicles.

I thought I'd leave this here in case someone else wants to do what I'm planning to do.

Cheers.