Why do you need 2 pci-e lanes if you're using the onboard graphics? The mini itx boards are your smallest, but don't have a pci-e slot. Here's an asrock with one pci-e slot: http://www.asrock.com/mb/Intel/Z77M/
($94.99 at newegg. Evga makes an sli p67 micro atx board, but it has no onboard video ports.