Bit-banging one I'd be surprised about mostly for signal integrity at that line-speed reasons. However even a home silk-screened PCB could probably handle that

Bit-banging one I'd be surprised about mostly for signal integrity at that line-speed reasons. However even a home silk-screened PCB could probably handle that and a USB control connection. Without deep knowledge hard part's likely the software, getting the connected item to work; probably as a virtual hardware device in a KVM or other emulated guest OS with the illusion it's on old hardware.