The madpuppets look perfect for a scavvy gang. And at 30mm, all you'll have to do is put them on slottas. For Orlocks, Catachans are perfect.
You might also check out Foundry's Street Violence line as well as some of the Reapers for
the other gangs/hired guns.
Searching odd mini companies can often turn up a mini oe two that fit in. My Escher gang even had a witch elf with chainsword and autopistol.
The pellet with the poison's in the vessel with the pestle.
The chalice from the palace has the brew that is true.