From the update:
The Praetorian Stalkers have been rendered (see below) and due to unforeseen circumstances we have rejigged the £105k Stretched Goal as follows:
1. At £101k we will unlock the necrobeast riders - UNLOCKED
2. At £103k the Mirrormen - UNLOCKED
3. At £105k the Sea Lions
4. At £107k the Valkyries
5. At £109k the Juggernaut armoured Hussars
6. At £110k the Crucifier and Free Marines