Might as well go all the way to AstroPi[1] at that rate. Though I wonder if Flir couldn't make a copper-top version for less money than either, really...
In which way is this "all" more than the flirc case? The Flirc case makes physical contact with the CPU and radiates heat all over the case. Don't let the black (removable) plastic top fool you - it's one solid piece the whole way.
https://wickedaluminum.com/products/raspberry-pi-4-standard-...