No, they're available on the store too. Bit bigger than I thought, but really, what size is a God-Machine supposed to be anyway?
Vanguard have their own Reaver and Warlord proxies, but they are not the ones in that pic. So they could be a different size.
Vanguard Dreadnought/Reaver:-
Jackal/Reaver:-
I had... the Adeptus Titanicus box set and an extra box of plastic Titans and (eventually) two boxes of Space Marine.
Painted the Titans very badly with humbrol solvent based paint and never *really* understood the rules.
So more about doing it properly, finally, for me :-)