I am afraid it might be a difficult search. You can try La Ronde des Bieres (http://larondedesbieres.com) but I am not sure you will find any. If you are able to move around you might have a better chance here : http://www.bieresdumondeetdailleurs.com/caviste-crau
The shop's pictures show Lindemans, De Troch's Chapeau, Huyghe's Floris and Van Honsebrouck's St Louis. So, um, fruitful if that's your thing. But not for the hard core, I guess. But, hey, De Molen, Haand, Mikkeller... some good stuff.