Hi atugores. Please be aware that the Ducroquet from OAM is only Hauptwerk v.2, and while it sounds nice, it doesn't have all the features available to v.3 or v.4 sample sets!!!
Did you look at the St Omer from SP? It is CC organ that is just a little more than the Ducroquet, but not as much as the Caen or the Metz. Also, on the site PCorgan there is a list of sample sets available from all producers, including a separate listing for free sets. Forum member josq has one on there called "Composite Cavaille Coll organ" that is quite good, and free!
Good luck on your search,
~S