Ever heard of Christa's Mulan page?
It's got some! Well, actually it's got the only ones on the net
For the midi's I don't know if I could help you, but Ben's Site, the complete Mulan Fan Fiction Collection has probably every single song in the movie, and more!
It's found at www.mulanfiction.com
I will have to ask the other guys about the address to Christa's Page.
See, I'm the only person that pops in here from time to time nowadays. Most people hang around at the Mulan Webbies Forum, you can find most things Mulan, if you want.
Please come, you would be really welcome!