Dell studio xps 9100 usb 3.0

Hi everyone! So I recently dusted off the old computer I had and decided to use it and realized it was still pretty good to use. But I realized it needs a 3.0 usb. I know it used to be an option to get that in the front port. I've watched videos and the links lead me no where because this computer is old. Do you know of where I can buy the port and which one would work perfect on it? I can install it myself, the handbook shows you how to do it, I just cant find where to buy the piece I need. Thanks so much in advance!