The $200 bit might be wrong, I'm going from memory, but I remember Moore at the Sinn Fein fundraiser.
It would have been early - mid nineties, probably during the first IRA ceasefire, but again I am not sure of the details.
I saw it during a programme looking at Sinn Fein in America, and Moore was one of the few celebrities who attended that I'd heard of. I'd been a fan of Moore's BBC series up to that point, even though I disagreed with a lot of his views.
Couldn't find anything about it on a Google web search, but a groups search turned up a bit:
http://groups.google.com/groups?q=%22michael+moore%22+sinn+fein&hl=en&lr=&ie=UTF-8&safe=off&start=0&sa=NI can't remember many of the details (judging by what's said in the newsgroup postings it was 8 years ago), but I am sure of the central fact of seeing Moore at a Sinn Fien fundraiser, and not as one of his programmes. It struck me at the time as very hypocritical.