Hi,
The USB bracket is a standard USB 3 extension slot for internal headers with a extension, you can find them everywhere on Ebay or Amazon.
The graficports are extended from the motherboard with extensions i found on Aliexpress and a empty slot bracket for DVI and HDMI, also Aliexpress.
The MB is a Asus B150 wifi/aura with an i5, a leftover from my G4 Cube Mod.
Thomas