2 way SLI GTX 660TI with 5 monitors

Hello! I have a weird case involving a bunch of monitors and SLI. So, what I have is a big workstation setup with 4 displays and 2 660TIs in SLI, but I also own an Oculus Rift. The Oculus requires a DVI or HDMI port of it's own, but obviously I've already used all the ports on one GPU. Is there any way to use the Oculus without deactivating one monitor?

Thanks a lot!

How about a dvi signal splitter? This would allow you to run both the oculus and the monitor. Not sure that is what you're aiming for.