i know he is on there,wether he sells them i would imagine so,why dont you ask him?
what you have to understand is,wether its sad or not,its his pet project
i made one once,hardest part for me was dealing with the keyboard,theres a hint,the roms are easy-ish
i wont be explaining how either,i was curious so i worked it out,thats just out of respect for his project