I'm not sure there was ever another head for the 1.4, it was quite a short lived engine being dropped in favour of the 1.2 16v. The 1.2 is a completely different engine so the head is highly unlikely to be compatible. It would probably be simpler to buy another Bravo with another engine.
There is very little information on the 1.4, it seems to stand on its own, a 1.2 FIRE variant or a 1.6/1.8 128 engined Bravo is favourable.