The website is turd, but if you go here
http://www.escalade-74.com/then click "les topos" and scroll down until you reach the right block (16th one!) it has a crag list for the guidebooks.
Looks like Biossonay is in there, but I think that Foron is in the Giffre, Risse and Foron Guidebook (the one above). No idea about Church Crag.
Both of my guides are out on loan at the moment (my Giffre guide is the older one anyway) so I can't telly you much more than what's there.