ktm125ktm125

I have a 1995. Ktm 125sx. That was my dad's. The bike runs but it needs a new clutch. And I was wondering where would be the best place to look ? Also I was told that the years from 93-98 are all interchangeable?. Last question. Can you put a 250 clutch in a 125? I am able to find more 250. In...