I will be using
-an old original gameboy case
-Screen from gearbest with a 3D printed bracket (HoolyHoo)
-SNES colored buttons (if they fit, I have a snes --controller from China coming, if they don't fit I will use original maroon or black buttons.)
-simple button PCB from ebay
-banggood style Power Boost
-usb or pwm audio, I have parts for both, not sure I want to put a hub inside, so I might stick with PWM.
I will update this thread with progress once I receive a few more parts.
I modified the case tonight. I'm going to leave the battery compartment intact this time. See how that goes. Did it all by hand with knives and sand paper.