I also have a Crossbreed IWS tuckable that wears well, also for the CW45. I was told that this holster would accomodate just about all of the Kahr pistols regardless of caliber and slide length. This was before the P380 came out.
Just about any holster that will work with the P40 should also work with the CW40, except possibly a closed muzzle kydex type that might not accomodate the extra .10" of barrel length.