Thank you to exodus for the info on London Serei Tanteidan. I have an extra copy of Donpachi for the Saturn up for sale or trade. $60 shipped.
4K: https://i.imgur.com/Jh1xNks.jpg
4K: https://i.imgur.com/5P6XAbt.jpg
4K: https://i.imgur.com/Jh1xNks.jpg
4K: https://i.imgur.com/5P6XAbt.jpg