Question Source for custom expansion card backplates?

[Involute]

I need to pass some USB cables and other wires from outside a tower-case to the inside, and the most elegant way would be through a custom expansion card backplate. Does anyone here know of a source for these (I just need one)? I haven't been able to find any, but my Google-fu is weak. Thanks for any tips.

 

[Eximo]

Are you connecting the USB cables to the motherboard or using the computer in a normal way, or are you just using USB cables for some other purpose?

Certainly plenty USB headers and brackets you can get that plug into the board and offer more external ports. These could be re-purposed to carry a signal for some other purpose, they just wouldn't have standard USB connector, but rather the 10-pin (USB 2.0) or 20 pin (USB 3.0) header.

Or could just buy those and strip off the parts you don't need.

https://www.amazon.com/（2-Pack-Comp...9d3ad&pd_rd_wg=L5Nzk&pd_rd_i=B06XCVSPZ1&psc=1

 

[Involute]

I’m using the PC normally. I just want a remote box with five USB ports, power and reset switches, power and HDD LEDs, and headphone and mic jacks (12 additional wires). Your suggestion to repurpose USB wires is a good one, though it would be nice if I could pull this off with a max of two back plates, so something like this, but in USB 3.0. That would save me having to make one or two custom plates.