Welcome to the forum, Peter!
We have special rules for rally tires in Sweden. All tyres must be controlled by the Swedish National Sporting Authority for motorsport called SBF. They make lists of tyres you are allowed to use. They have not a list for 2009 summer tyres yet but you find some useful links below:
Perhaps you can use some information in these lists.
Back in the good old days I used Dunlop SP gravel tyres but that was a long time ago.