If you cannot find the proper regulator or just don't want to bother, remove the regulator and apply a regulated 5V directly to the 5V power pin.
Note: On the Official Arduino schematic, the 3V3 has 5 pins. the 5V regulator has 4 pins/Solder connection points.
Also note, never use an unregulated power supply on a Arduino. And never apply more than 12V to the power input port. Even though the specs say it can handle a higher voltage, It is not a good practice to run any regulator at it's upper limits. The regulator can heat up, and caused damage to your board.