Solenoid slots

So our team is a little behind this year, but we are planning to use at least 5 solenoids. however, with the solenoids we are using, we would need 10 relay ports with only 8 available. I also know that we can add another slot into the cRIO (port8). My main question is could we use the DI/O on the DSC?

Not the DIO, but the Relay outputs coupled with Spikes are legal for running additional 12v solenoids.

is there a place where we could order another relay imput for the port 8 on the cRIO?

cRIO Solenoid Module: http://sine.ni.com/nips/cds/view/p/lang/en/nid/14175
Solenoid Breakout: http://www.andymark.com/SearchResults.asp?Cat=41