the photo you shown i guess is comman brick, which is normal brick to build house lo, never come in 'panel'. but nowadays ppl use veneer brick as decoration. as in veneer cause it's very thin, only like 8mm maybe? this company provide: http://www.claybricks.com/new/products_brick_veneers.html but then i remember they only accept big order, otherwise you need to wait for few months. another choice is (what i used for my project) is get from terracotta tiles centre, but it's more on clean look.