YouTube is currently the best place to find it, just put together or find a playlist. I was spoiled with this, because we built a website for creating YouTube Playlists and we made a bunch of really good ones for Video Game Music. That site is mostly broken now though...

But I will still provide you with my favorite collection of 8-bit (well 16 bit technically) music: http://flotate.com/?p=12352-Phantasy-Star-2-Soundtrack