I live in Auckland and have a property in New Plymouth as I use to live there. My house was on the market and the real estate salesperson advised me that the tenant had removed the firebricks upon vaccating. I phoned a fire place shop in New Plymouth where I was given Derrick Foley's name and phone number.
My house went unconditional prior to my contacting Derrick Foley. Derrick reinstated the firebricks and also made up a baffle for my fire box as it was an older model for which baffles could no longer be obtained. Derrick Foley did a fantastic job and kept me informed throughout the process. His price was also reasonable and affordable. Derrick even drove out of his way to return the keys to the real estate office upon completion of the job.
If you want firebricks and professional honest advice, Derrick Foley is the man to contact. I rate his business as 5 star.