I wonder how many people care about Mega Man 3 for the PC, to be honest. The NES Mega Man 3/III is probably my favorite Mega Man game (and is often at least comparable to everyone else's favorite, Mega Man 2/II) but the PC Mega Man 3 is nothing like it and looks rather bleahish. Since Capcom didn't develop it themselves, I see it like the Mario edutainment titles or the CD-i Zelda games...something fans of those franchises could be excused from not playing.
Regardless, SOME abandonware site must have it, so that it could be mapped for the sake of completion...
I actually bought the first Mega Man game for the PC...why? I wonder if I still have the original box and floppy somewhere, not that I plan to enjoy the game... >_<