The BladeForums.com 2024 Traditional Knife is available! Price is $250 ea (shipped within CONUS).
Order here: https://www.bladeforums.com/help/2024-traditional/
If they're older bricks, they may contain asbestos. Be careful.I built my first one about a month ago and it looks almost exactly like yours. On my next one ( I have about 50 firebricks that were in a shed on my property when I bought my house) I'm going to try to make the chamber more precisely round and put the burner farther to the rear and angle it forward slightly in an attempt to get the heat working it's way forward more evenly instead of having one hot spot. I also drilled the hole for the burner at the top edge of the radius instead of at the center (where the bricks meet) like yours. I don't know how much difference that makes.
I also had my chamber cut all the way through the bricks and had a third brick in the rear.