Another option instead of the ultimate expansion, could be good?

Vampire 4 Mini-ITX I/O Board

This is a simple, modular and inexpensive mini-ITX I/O Board for the Vampire 4 Standalone from Apollo Computer. 

It allows you to easily mount the Vampire 4 in any mini-ITX case. The Ports for Mouse and Joystick (DB9 and USB) will be redirected to the back. The I/O Board supports also a 5.25" connector to power a hard drive or optical drive (requires 12V or ATX PSU).

https://www.pcbway.com/project/shareproject/Vampire_4_Mini_ITX_I_O_Board_8085df3d.html