Ramshackle Games have added a series of 28mm vehicle parts to their online store.
From their announcement:
We have just added soem new products to the store. The most exciting is the Super Mudwhumper Wheels. These are really huge wheels to make all-terrain vehicles with. Priced at £3 a pair, these were mastered by Curtis Fell and Sam Horsburgh.
The other two pieces were both mastered by Leo Blackband. They are an engine and a “filler block”. The filler block is a great basis for starting a vehicle from, using other bits from our tridlins catalog.