If you don't want an IDE HDD and would rather a SATA drive with an IDE adapter, let me know I could make you one. It's what I use in my own setup. I believe it's the 2.12LN version.
I also have a spare IO board. However it is version 1.8 and for my setup it wouldn't work. I'd get the screen flash but no guns would register. When I got a version 1.9 IO board, everything worked fine. So I can't promise you that it would work with your hardware or not.