Hi Jesse
Me again just found your recent post, i am nearing the end of my very long term M9 restoration and my vehicle is complete and original in respect of the rear floor and lockers, it might be better if you send me your private mail address as i have loads of photos i could send you which should explain everything, i live in England so cant realy post upu anything.
The rear centre section is quite complex and would be difficult to copy without good photos and measurements.
Ian