I designed something for this ages ago but that's as far as it went - design.
Basically you get four vertical mount USB male plugs and solder them to perfboard in positions that line up with the Pi usb.
You run some traces through the board to four vertically mounted female usb ports on the other side of the perfboard.
You also run a trace from 5v and ground out to a 2 pin header and done, all without affecting Hats, cases or usb.
You just need to be aware that it uses the 5v from the USB.
Or you could scrap that ghastly idea and just buy a cheap usb hub, pull it apart, and use the 5v from that. Bonus is now you have an additional 3 usb ports.
Or even easier, is to put a male usb plug onto the fan and plug that into the USB hub. You only get two additional ports this way, but ut won't require hacking up the USB hub.
Edits because silly phone auto-incorrect
Last edited by Imperf3kt
on Mon Nov 18, 2019 8:18 pm, edited 4 times in total.