I believe that the Alitx 350 can use an IO10 card which is SATA instead of SCSI. It could at least improve your odds of finding a card.
Yup!
The IO10 is generally a little harder to find than an IO9, but it does at least add a 3rd option. Probably the best option of the three, actually - onboard gigabit ethernet and SATA boot options are quite nice to have.