You can easily find dirt cheap Via C7 terminals from Wyse. They can work as a retro machine or perform other functions. More often than not you can buy them without power supply and any stand or feets.

I designed mine to be easy to print, just slide in and device is kept in right position, with proper ventilation below.

Printing tips:

• I used PLA, if you plan to use it in closed cabinet or near heat source consider using PET-G or PCTG, device itself gets quite warm
• 0.2mm quality or draft profile
• 3 perimeters (this is important for strength)
• 0% infill (infill does not give any strength here but wastes time for endless retractions)
• print on the side as in a picture to get most of material strength
• Single feet takes around 30 minutes (incl. warm-up), all four takes around 1h 20m