I just listed a complete MPC 2000xl and MFC49 bundle with the mounting brackets on Reverb.com
This is an all-original setup and likely the most complete in circulation (8 outs 32mb, all the snakes and cables.
I have traced the mounting brackets and will be fabricating a few, feel free to reach out if interested. Here is my shop:
https://reverb.com/shop/chittysmusicgear