A great cover maker who goes by the name of iX has sent in front and back covers for DCGNUboy, Here are the covers for you to see:

Download them https://dcemulation.org/covers/index.cgi?get&CD%20Covers/DCGNUboy/DCGNUBoy-NTSC-Back_iX.jpg and https://dcemulation.org/covers/index.cgi?get&CD%20Covers/DCGNUboy/DCGNUBoy-NTSC-Front_iX.jpg
A big thanks to iX for his covers and also to Dr Zoidberg for uploading them.