Fat Dragon Games have released their 28mm paper miniature Siege Engines.
From their announcement:
“Have fun storming the castle!”
Siege Engines Volume 1 brings you everything you need to wage cardstock war on your tabletop. This set includes a siege tower with opening ramp, ballista, ram and catapult. The tower and ram both feature user selectable textures that include bare wood, animal skins, steel plates, splattered mud and a painted skull to allow customization prior to printing.