I believe the official statement* on sharing the ripped image assets from AO/AE is that it's fine as long as it's not for money. I don't know how MO would work with regards to what Microsoft own, but if you emailed through the worst that can happen is that they say no. I'm sure lots of people would love for you to get permission and release them, maybe in a different thread.
*
Wil said it here. I think there was more communication earlier on in the .LVL files project, but I can't be bothered finding that.