frost resistant bricks

it is a myth that only blue and red engineering bricks are the only frost proof bricks. Many bricks manufactured today are frost resistant, the only way to truly find out is to check the manufacturers specification which will give you info like compressive strength and water absorption etc.

Unless you are considering placing a very substantial order then I’m sure you will find no brick manufacturer will make a brick to match your current bricks. However you may find the same brick or reproduction of said brick already available.