Funny .... I just went out about one hour ago and bought the junction box (you have pictured), a black dual switch box, a black receptacle cover and a couple of extension cords (which I will cut apart so I can add switches to them).
I found the Ethernet connector you have pictured at Ram Electronics, but I can not find the USB connector you have pictured. Can you supply a link to the USB connector? Also, can you help me find headphone jack and PS2 connectors as well.
BTW: Thanks for the information.