I have been using some D&D plastic ready painted figures that I picked up at various wargame shows. They are often used in our fantasy "Games with Grandad" when we could meet.
So provisional ideas for Zone Alfa
GIANT CLAM - (made from a bottle top bent double.

Exp: 1 Wnds: 1 Mov: 1” Combat: 5 Armr 4 Will 4
BI-VALVE: M FP: 1 Dam: 0
If Clam wins then victim trapped and suffers -2 melee penalty.
LANDSHARK

Exp: 2 Wnds: 2 Mov: 9” Combat: 4 Armr 6 Will 4
V Big Teeth Claw: M, FP: 2, Dam: 2
Ignores first pin marker.
Attacks anything edible. May hide part buried relying on vibrations to alert it. It is stupid and vicious. It can leap 3” if it moves 6” and has FP 4 Damage 0
ASH HOWLER

Exp: 2 Wnds: 1 Mov: 8” Combat: 5 Armr 4 Will 6
Very Big Teeth & Claws Range: M FP: 1 Dam: 2
Roar: Expend action to roar. All in flame template take pin marker if they fail Will test -1.
LAUGHING STALKER

Exp: 2 Wnds: 1
Mov: 8” Combat: 5 Armr 4 Will 5
Teeth & Claws: M FP: 1 Dam: 0
Bloodsucker holds on to victim d3 turns
Lures victims with an almost human laugh.
AZURE HYDRA

Exp: 1 Wnds: 1 Mov: 3” Combat: 5 Armr 4 Will 4
Big Beak : M, FP: 1 Dam: 1
(thinking of allowing this creature spit poison to disable victim but worked out the rules yet)
CRESTED BERSERKER

Exp: 2 Wnds: 1 Mov: 8” Combat: 5 Armr 4 Will 4
Big Teeth & Claw: M FP: 2 Dam: 1