Gamebox Systems just released a custom SD card lid designed specifically for Citrus3000Psi‘s SD2SP2.
The lid will cover the serial port’s space in its entirety leaving a tiny opening for accessing the micro-SD card.
The lid, which comes in different colors, is offered as a kit, including the SD2SP2 itself and is priced at ~17$.
Check it out here: https://gamebox.systems/products/sd2sp2-lid-kit