This is from our store in Lexington KY. This is the Monessen BUF400 with the Monessen Mountain Cedar logs in an 18". (The logs come separate from the vent free box.)

The Monessen Hearth has a link on their website where you can see a dealer closest to you. http://www.monessenhearth.com/WhereToBuy.aspx

Another box that looks close to this is the Everwarm EWVF36. https://hearthandhomeconcepts.com/products/monessen-universal-vent-free-firebox

Here is the Everwarm Box:

http://hearthandhomeconcepts.com/products/everwarm-36-vent-free-box-ewvf36