Ramshackle Games have released a series of resin Dunger Riders.
From their announcement:
I’ve just added some new sets to the Ramshackle Games web store. They are both variants on the same theme: Dunger Riders! One set comes with spear arms and is the Orc Dunger Riders. The second option comes with a selection of arms carrying post apocalyptic equipment.
Both sets are resin and retail at £10 for six riders.