Depends on how easy a swap you want. It is possible to fit a non-Lucas alternator quite easily
I went for a 60A NipponDenso off a Proton Persona, just find something built in the Far East.
I think the Daewoo Matiz is a straight swap, but you need to take the engine out to access the alternator.
Then modified the mounts to fit, I went for a threaded rod, as the unit is quite a bit smaller. Then swapped the pulley over from the old one.
