NES PC Kit - USB Controller Port, Audio Video, RF
Update: Version 2 (Slightly Modified for better fit on all parts)
So there's a few designs out there for NES USB Controller Ports, but they weren't quite right. So I remixed them and made one that should replace the existing port and allow a female USB connection to fit perfectly.
This kit also contains custom designed fillers for the holes left when removing the NES motherboard. The Audio Video port and the RF / Channel / Power Ports.
Ideally, this kit provides everything you need to make your NES PC build ready!