Here's the source one.
http://www.vgmusic.com/music/console/nintendo/snes/ff3over.mid
Well, from what I could find on VGMUSIC.COM. But you kind of have to understand the story behind it. I was just messing around with Fruity Loops over at a friend's house. I came up with the opening of this remix and I was sitting there and said, "Ok, now I have writers block. I have no idea where to go from here." And my friend says, "Well, that sounds a lot like Terra's theme." And then I went on from there to create what I did. And then once I got done with the acoustic part of the melody, my friend says, "well, make this next part more progressive-rock-like." So I tried to transition it from acoustic guitar, to electric rhythm and lead guitar, with a keyboard and drums and bass guitar. And then after I completed the transition, I was just like, "How can I make this as progressive as I can without going too far outside of the borders of the melody and still keep it all in check?" And that's what I came up with. Also, I don't know if you noticed, but I added a little bit of the Final Fantasy theme in there as well in the bass line and the keyboard at one point.