Its not GW as far as I know YPU - more likely Fantasy Flight....
As for the Micro machines figures, let me know if you got down that route, as I should have a few kicking about - i've been hoovering up most of the WEG that have appeared on ebay in the last few weeks.....
The Micro Machine vehicles are great for the most part. The figures leave something to be desired.
Another source of vehicles are the Transformer Crossovers. Mostly in scale with the figures.