I wish I could say I have the Mugen but unfortunately I don't at this time. I've been working hard on an upgrade that gets into dynamic roll centre, droop and some chassis roll animations. This work has been consuming all my spare time lately.
I do have an idea on how I can build models using digital photos though. It will involve some work on your part to take photos of the chassis with a ruler included to provide a scale I can work from. If you are up for it let me know and I will get together an example of what I need to try this out.