There are similar sized DMX pixel controllers on amazon—search for "DMX SPI Decoder," there should be a few different models/sizes in the $25-35 range.

EDIT: LINKS
https://www.amazon.com/Decoder-Microchip-Driving-Display-Support/dp/B00PQAW5AMhttps://www.amazon.com/ALITOVE-Decoder-Controller-WS2812B-DC5V-24V/dp/B07QYKX2SVhttps://www.amazon.com/Converter-Decoder-Controller-Compatible-Digital/dp/B072JVR3N7/https://www.amazon.com/ALITOVE-WS2812B-Controller-Decoder-DC5V-24V/dp/B07F2V4WFV