1. Simon's wet suit.
Its a bona fide Ironman suit, without sleeves, size M, still in very good condition.
Pros. It fits, putting it on has to be done very gingerly.
Cons. Bouyancy is much less than the full sleeze type wet suit. There was significant chaffing around the neck after only 10 mins, but this can be remedied with lots of vaseline or "BodyGlide"
Overall it will do.
2. Neoprene suit, which I bought on the internet. It has sleezes, size L
Pros. Buoyancy is incredible, doesn't feel like swimming at all, its cheating
Cons, it seems to be leaking (because its slightly too big), but still buoyant. It presses against our Adam's Apple (very scary feeling).
Still more testing to be done
3. Buy the official wet suit at Busselton two days before the event.