There are many good gunsmiths around who will be happy to install a brake on your rifle for you. But it will take some time, as most smiths have large amounts of work lined up at any given moment.
I do have to ask why you need one on a .30-06 though. They don't kick very hard and are rarely fitted with muzzle brakes. A Limbsaver or Decelerator recoil pad is cheaper, faster to fit and generally tames down much harder kicking rifles to a tolerable level, so you should find your '06 to be manageable with one. No obnoxious noise from a brake either.