A site was closed in may 1997, because the Toonder studios did not allow the use of illustrations. This requirement explains that there are few sites.
On the Web, the Bommel meeting areas are still rare
Here are the sites you may visit (without preference order).
one page of the Panda editions (in Gravenhage, Netherlands - written in dutch...). It presents the luxurious edition of adventures of Tom Poes and Mr Bommel, published in the weekly magazine "Revue". Coloured illustrations are to be seen !