Antique fire extinguishers are available for sale on a website called Antique Fire Extinguishers. EBay is also a site that sells antique brass and copper fire extinguishers. The condition of these extinguishers varies.
Restored antique fire extinguishers made of brass and copper from various companies are available on Antique Fire Extinguishers. These extinguishers come restored, but this company also restores clients' fire extinguishers. If this site does not have in stock the specific extinguisher that a customer desires, the company helps locate one.
On eBay the various extinguishers are available in restored and unrestored condition. Prices vary depending on the condition, age and brand of the extinguisher.