There's only really 2 pre-release builds of Team Fortress 2. The build in the Postal 3 leak and the version 0 pre-load/retail DVD version. The Postal 3 build isn't compatible with the provided engine in the leak and no engine available supports it, so it currently can not be run.
Anything relating to Invasion are fan rebuilds of the game. Only the source code and 2 models were ever leaked.
Anything relating to VTF/TF2: BoA is a map found in Half-Life Net Test 1 (assault.bsp) and an early model in the Half-Life: Source model sources.