From the release:
After a great fun and highly successful Kickstarter campaign, I have just released some new models. Three Rhebok variants have gone up in the Ramshackle Games web store. These were all funded through the Iron Brothers Kickstarter campaign.
The vehicles are a tracked or wheeled transport variant, plus a flame assault version. The models are cast in resin. As usual the parts can be obtained separately from the Tridlins section of the web store.