Thanks RR100, Legion, Kolonel,
RR100: Considered a front bay screw type USB, but decided to leave it clear.
Legion: True, I figured pretty much any new board these days has USB3 almost, so had hoped a little upgrade to the case might benefit.
Kolonel: Unfortunately my case is much too old :\., it's the older Antec Super Lanboy case that came out about 10 or so years ago :\. I had a look online for any aftermarket boards someone may have created, but no luck.
I think in the end I'll have to stick with just soldering on a new USB2 dual port & leave the USB3 option to the new owner.
Thanks again guys, I really appreciate all the responses
Regards,