If you wish to match the style of the base exactly, you can use the free drawing software paint.net and use the tool settings below.
Want to make your own helmet? You can find the STL to print your own here. If you think you can improve on the design or want to modify it to make it your own can get the CAD file here. The head is actually built to use two 8x8 WS2812B LED matrices for the eyes. To drive them, you can assemble a controller using an Adafruit Scorpio RP2040 board and an Adafruit I2C gamepad using this code.
