Furidion Games is now selling copies of their Unbridled Fury rules via Wargame Vault.
From their announcement:
Unbridled Fury is now available for sale via Wargame Vault. Whilst this means the free version will no longer be available it also heralds the beginning of a new era for the game. The rules are finally finished.
A print on demand version of the game will be available shortly as well.