I have a spare Lud and the little fella on the second row of the third pic, resting his hands on a large puffball. I have another spare who seems to be a variant on the guys in the first pic of your spares holding a mushroom in left hand and net in the other - except mine has a spear and a net. Also got a spare hammer snot - marauder pic right hand end of the second row.
Ones I'd be after would be the cheeky chap with hands behind head and blowing a raspberry, the chap with the curved blade in the second pic down and the one next to him with club raised or any of the top row in the fourth pic of your swaps.
That is as clear as mud no doubt!
Cheers
Steve