just try font town itself, or have a look on mappy.com.
when you get to the essonne site, selecte the pink region, and make sure things are on the milly side of the area - again use mappy.com
or of course you can be lazy and ring up the gite offices as ther'll be an anglophone there. tell them you've not got a computer or they'll just tell you to go on the website :roll: . also check before booking where thing are - they offered us a gite whihc was about an hours drive from any crags. that'd be like frenchies coming over to the peak and getting accomodation in hull.
P.S. i hope you get a good reacharound.