Assuming you are in USA go to NEWEGG and computer cases then search in computer cases search for usb3.
Amazon will have some too.
Thermaltake ARMOUR A60 $75-25 rebate = $50, Lian Li PC K57 (WAS $60, OUT OF STOCK, new stock has USB3, not sure with old, new $140 omg) [Amazon : NZXT Source 210 $50 shipped, will need fans, not toolless]
These are possibilities with USB3, depending on buy date, rebates, and shipping, ie over limit now, newegg.
Approx NZXT Source 210 (white or black) $50 +$15 ship, Rosewill FUTURE Gaming $70 shipped, Inwin BUC $95-30 rebate $65. Thermaltake V9 Black $95-$25 rebate= $70.
You will find some reviews here on Toms.