Newegg offers the Icy Dock Flex-Fit Trio 5.25" Adapter/Bracket, model no. MB343SP, for $7.99. Coupon code "EMCPDW39" cuts it to $6.79. With free shipping, that's the lowest total price we could find by $2. It allows two 2.5" drives and one 3.5" drive to be installed in a single 5.25" drive bay and includes a snap-off front dust cover.