Used - Very Good: MSI X58 Pro-E LGA 1366 ATX Intel Motherboard - Newegg.com
Original MSI X58 PRO-E X58 PRO Motherboard MS-7522 Intel X58 DDR3 | eBay
Amazon.com: Motherboard Gaming ATX Motherboard Fit for MSI X58 Pro Motherboard LGA 1366 DDR3 for Intel X58A X58M Desktop Mainboard SATA II PCI-E X16 : Electronics