I used a 100en for many years, which I think has the same torch & never had a problem with it, why do you think you would like to fit a better one? If you go down the euro torch conversion route it will cost quite a bit to do, with probably no real gain. The torch shroud is larger, this may also be a disadvantage in the confined space of the Moggy.
This is just my thoughts, someone else may think completely differently.