Mounting the steppers
I spent some time trying to get the steppers mounted. I think I have a solution.
I managed to get both the X and Y motors mounted. It's not pretty, but it should work well enough to use it to make better mounts for itself.
Here is a detailed view of the mount system. I just used some aluminum strap to make adapter plates and some threaded rods to hold the motors steady. To link the shafts, I used some stiff rubber hose and pipe clamps. Again, not that great, but hopefully good enough to make it's own replacement parts.