I apologize in advance for the frustration this will cause.
There is a new DRM stripper for Mobipocket ebooks out on the web. It's written in Python, and it works. Unfortunately, I can't help you find it.
Our forum policy on DRM removal tools is that I can mention the name, and give vague instruction on how to find it. I can't provide a link to the tool. Unfortunately, the new tool doesn't have a name yet. In fact, it hasn't been released or announced or anything. What I have is not the tool, but the source file. A link to the source was posted by a member. The source file is currently on
www.pastebin.com. Look there if you want, I doubt you will find it.
So here I am. I can't tell you the name or location, just that it exist. That's not very helpful, I know. I'm sorry.
P.S. I like our forum policy. This is the first time that I've been blocked from helping people.