Actually you will find that 90% of the motorsport world wide run clockwise. The counter-clockwise thing is more prominent in North America.
Many H0 tracks (Tyco, AFX) run counter-clockwise as they are more focused on North America.
In any case, as DR_C said, flip the powerbase around and it will work fine...
This does mean though that if you want a pit lane that goes into the infield you will need a left-hand entry.