$64.99 IVY Classic 10332 1/2 x 12-Inch Premium Carbide Masonry Drill Bit, 3/8-Inch Reduced Shank, 1 
Amazon.com: 1-1/2 X 12 Masonry Drill Bit: Industrial & Scientific
Hitachi 1/2-in x 36-in SDS-Max Drill Bit in the Masonry Drill Bits department at Lowes.com
