There were two types of Martian walker in the programme, The large manned 300 ft tall Herons and the smaller automated 20ft tall Spiders. In 6mm terms that translates to models 30cm and 2cm tall which might not be possible, but I think I have come up with some suitable looking proxies.
|Martian Tripod (photo Troublemaker Games)|
Invader Frigates (photo Spartan Games)
The alternative is Spartan Games who produce a range of Invaders for their steampunk Dystopian War game, including two different sizes of tripod, the Frigates and the larger Cruisers. I do like the look of these and whilst not as clockwork looking as those in the mockumentary, they probably are the more logical choice, and their tiny flier tokens could be used a Martian Lice if I ever need some.
|Invader Cruisers (photo Spartan Games)|