Saw this post a bit too late to help, Muckles, but in any case you seem to have found one closer to suit.
I would have suggested Le Relais de la Route d’Or on the D 338 just south of Alencon. Highly recommended, there is a very friendly welcome and they stay open, they have told me, as long as someone is there to eat!
I have stopped a few times. The parking is reasonably surfaced too. One for the future perhaps.
Not been to the one you did find, so that is in my memory bank as well now.